The statistic shows the 20 countries with the lowest fertility rates in 2024. All figures are estimates. In 2024, the fertility rate in Taiwan was estimated to be at 1.11 children per woman, making it the lowest fertility rate worldwide. Fertility rate The fertility rate is the average number of children born per woman of child-bearing age in a country. Usually, a woman aged between 15 and 45 is considered to be in her child-bearing years. The fertility rate of a country provides an insight into its economic state, as well as the level of health and education of its population. Developing countries usually have a higher fertility rate due to lack of access to birth control and contraception, and to women usually foregoing a higher education, or even any education at all, in favor of taking care of housework. Many families in poorer countries also need their children to help provide for the family by starting to work early and/or as caretakers for their parents in old age. In developed countries, fertility rates and birth rates are usually much lower, as birth control is easier to obtain and women often choose a career before becoming a mother. Additionally, if the number of women of child-bearing age declines, so does the fertility rate of a country. As can be seen above, countries like Hong Kong are a good example for women leaving the patriarchal structures and focusing on their own career instead of becoming a mother at a young age, causing a decline of the country’s fertility rate. A look at the fertility rate per woman worldwide by income group also shows that women with a low income tend to have more children than those with a high income. The United States are neither among the countries with the lowest, nor among those with the highest fertility rate, by the way. At 2.08 children per woman, the fertility rate in the US has been continuously slightly below the global average of about 2.4 children per woman over the last decade.

While the standard image of the nuclear family with two parents and 2.5 children has persisted in the American imagination, the number of births in the U.S. has steadily been decreasing since 1990, with about 3.67 million babies born in 2022. In 1990, this figure was 4.16 million. Birth and replacement rates A country’s birth rate is defined as the number of live births per 1,000 inhabitants, and it is this particularly important number that has been decreasing over the past few decades. The declining birth rate is not solely an American problem, with EU member states showing comparable rates to the U.S. Additionally, each country has what is called a “replacement rate.” The replacement rate is the rate of fertility needed to keep a population stable when compared with the death rate. In the U.S., the fertility rate needed to keep the population stable is around 2.1 children per woman, but this figure was at 1.67 in 2022. Falling birth rates Currently, there is much discussion as to what exactly is causing the birth rate to decrease in the United States. There seem to be several factors in play, including longer life expectancies, financial concerns (such as the economic crisis of 2008), and an increased focus on careers, all of which are causing people to wait longer to start a family. How international governments will handle falling populations remains to be seen, but what is clear is that the declining birth rate is a multifaceted problem without an easy solution.

The autonomous Spanish city of Melilla, located in the Northern coast of Africa, had the highest birth rate of Spanish cities in 2023: 8.99 births per 1,000 inhabitants. Asturias, on the other hand, had the lowest birth rate, with 4.51 births per 1,000 inhabitants. As of January 2024, Andalusia was the most populated autonomous community in Spain, with a total amount of approximately 8.6 million inhabitants. Spain’s population increases Spain had one of the lowest fertility rate in the European Union in 2023, with approximately 1.29 children being born alive to a woman during her lifetime. In comparison, the fertility rate in France was set at 1.79 that year, whereas Ireland reached 1.76. In 2024, the total population of Spain was around 48.4 million people and was forecast to increase by 2028. Opposite trends There are two reasons for the slow upward trend in Spain’s population. On the one hand, more people die in Spain than are being born in the latest years. On the other hand, while Spain’s population moved away from the country in the wake of the 2008 financial crisis, the country became a net recipient of foreign immigration again after 2015.

While the standard image of the nuclear family with two parents and 2.5 children has persisted in the American imagination, the number of births in the U.S. has steadily been decreasing since 1990, with about 3.67 million babies born in 2022. In 1990, this figure was 4.16 million. Birth and replacement rates A country’s birth rate is defined as the number of live births per 1,000 inhabitants, and it is this particularly important number that has been decreasing over the past few decades. The declining birth rate is not solely an American problem, with EU member states showing comparable rates to the U.S. Additionally, each country has what is called a “replacement rate.” The replacement rate is the rate of fertility needed to keep a population stable when compared with the death rate. In the U.S., the fertility rate needed to keep the population stable is around 2.1 children per woman, but this figure was at 1.67 in 2022. Falling birth rates Currently, there is much discussion as to what exactly is causing the birth rate to decrease in the United States. There seem to be several factors in play, including longer life expectancies, financial concerns (such as the economic crisis of 2008), and an increased focus on careers, all of which are causing people to wait longer to start a family. How international governments will handle falling populations remains to be seen, but what is clear is that the declining birth rate is a multifaceted problem without an easy solution.

In 1900, the present-day region of Yemen had a total fertility rate of approximately 6.9 children per woman, meaning that women born in Yemen at this time could expect to have approximately seven children over the course of their reproductive years. Contrary to global trends, Yemeni fertility increased throughout most of the 20th century, peaking at almost nine births per woman in the 1980s; between 1977 and 1994, Yemen had the highest fertility rate in the world, and no other country is ever estimated to have had a fertility rate exceeding 8.5 births per woman. Various reasons have been cited for this increase, primarily child marriage, lack of literacy or educational opportunities for women, and the wars within and between the partitioned Yemeni states in the 1970s and 1980s.

Following Yemen’s unification in the 1990s, the total fertility rate began to fall significantly. Despite ongoing violence and political turmoil, advancements in healthcare and humanitarian aid helped Yemen's fertility rate drop below seven births per woman at the end of the 20th century, and below four births per woman in the year 2020. The decline has slowed in the past five years, however, due to the Yemen Civil War which began in 2014. Yemen is currently experiencing what is arguably the most severe humanitarian crisis in the world, and its healthcare system has been almost decimated through war, famine and the lack of water or sanitation; it remains to be seen how these estimates may change in the coming years, given the long-term impact of the civil war and the humanitarian crisis.

In the Cook Islands in 2024, the population decreased by about 2.24 percent compared to the previous year, making it the country with the highest population decline rate in 2024. Of the 20 countries with the highest rate of population decline, the majority are island nations, where emigration rates are high (especially to Australia, New Zealand, and the United States), or they are located in Eastern Europe, which suffers from a combination of high emigration rates and low birth rates.

According to the most recent data, more people died in Spain than were born in 2024, with figures reaching over 439,000 deaths versus 322,034 newborns. From 2006 to 2024, 2008 ranked as the year in which the largest number of children were born, with figures reaching over half a million newborns. The depopulation of a country The population of Spain declined for many years, a negative trend reverted from 2016 onwards, and was projected to grow by nearly two million by 2029 compared to 2024. Despite this expected increase, Spain has one of the lowest fertility rate in the European Union, with barely 1.29 children per woman according to the latest reports. During the last years, the country featured a continuous population density of approximately 94 inhabitants per square kilometer – a figure far from the European average, which stood nearly at nearly 112 inhabitants per square kilometer in 2021. Migration inflow: an essential role in the Spanish population growth One of the key points to balance out the population trend in Spain is immigration – Spain’s immigration figures finally started to pick up in 2015 after a downward trend that presumably initiated after the 2008 financial crisis, which left Spain with one of the highest unemployment rates in Europe.

As per the latest report of Cognitive Market Research, The size of the global market for fertility tests was estimated at USD $ 1.32 Billion in 2022 and is anticipated to grow to USD $ 1.86 Billion by 2030, at a CAGR of 4.4% from 2022 to 2030. Factors Affecting Fertility Testing Market Growth

Rising Average Age of First-time Pregnancies

The fertility test market is anticipated to grow due to rising number of patients. According to the market study, the average age of first pregnancies has increased significantly globally as an outcome of the decline in first pregnancies among adolescent girls and the rise in first conceptions among women over 30. Women around the world are increasingly preferring to postpone their initial pregnancies; according to the OECD, women give birth at an average age of 30 or more; thus, the market’s expansion is fueled by the rising number of first-time pregnancies. Lowers rates of male and female fertility, and greater knowledge of cutting-edge fertility testing techniques are driving the fertility test market.

Restraining Factor of Fertility Testing

Lower precision of ovulation prediction kits 

The fertility test market will restrain the market growth due to use of ovulation prediction kits, The luteinizing hormone (LH) surge occurring every 24-36 hours during ovulation is measured by ovulation prediction kits. However, ovulation cannot be precisely confirmed using these kits. Ovulation predictors are not accurate in cases like luteinized unruptured follicle syndrome. Only LH can be detected by ovulation monitors; Additionally, the urine is ineffective when it contains the fertility medicine Pergonal or the hormone HCG (human chorionic gonadotropin). The fact that these kits do not work for women in their 40s (particularly those who are close to menopause) due to elevated levels of LH is another significant disadvantage. These drawbacks of ovulation monitors reduce their predictive power, which is preventing end users from using them.

Current Trends on Fertility Test Market Technology:

Technological development in fertility test market technology:

Nowadays, a lot of businesses and organizations host annual events like camps to educate people about fertility testing. Moreover, the market for fertility testing may expand due to the introduction of increasingly advanced tools and changes in lifestyle. For instance, Modern fertility introduced the pregnancy and ovulation test kit. In order to collect all data regarding fertility, they also released an exclusive app. The company's effort to bring fertility into popular wellness is aided by the app, which helps in reading and recording test results. Similarly, Proov's at-home ovulation testing kit was approved by the Food and Drug Administration (FDA) in March 2020. The revised Ovusense app (OvuSense V.2) was released by Fertility Focus Limited in May 2019. It has improved accuracy and flexibility in data. However, the market for fertility tests may be constrained by the ovulation monitors' dubious accuracy in PCOS/PCOD patients.

Impact of the COVID-19 pandemic on the fertility test Technology Market:

The outbreak of COVID-19 has witnessed a significant impact on the fertility test market's growth. The pregnancy kit market has been affected by the pandemic in various ways on the one hand, many couples anticipated getting conceived during the epidemic because of the extra time the lockdowns offered. On the other hand, several organizations predict that the COVID-19 economic crisis will have an impact on birth rates, resulting in fewer million babies, as well as associated unemployment, an increase in marital violence, and decreased access to healthcare during the antenatal period. According to the European Society of Human Reproduction and Embryology, all fertility patients are thinking about All patients considering or planning treatment.COVID-19 is predicted to have a substantial market share in the fertility test market. Introduction of Fertility Testing

The market for ovulation tests gives people the chance to find out if they can get pregnant naturally or not. A medical and physical assessment called a fertility test measures a person’s capacity to conceive naturally. Growing older is one of the factors that might impair fertility; therefore, women and men who are 35 or older and are having trouble becoming pregnant even after s...

The autonomous Community of Madrid was Spain’s third most populous region. In 2024, of the approximately ******************** residing in the Community of Madrid, the largest age group comprised individuals aged 45–49 years, totaling up to over ******* inhabitants. In contrast, the smallest age group was that of people aged over 90 years old, which amounted to only about 91,000 inhabitants in Madrid in that year. Spain’s fertility rate, the lowest in Europe Spain has one of the lowest fertility rates in the European Union, with barely **** children per woman, according to the latest reports. During the last ten years, the country featured a continuous population density of approximately 93–95 inhabitants per square kilometer – a figure far from the European average, which stood nearly at 112 inhabitants per square kilometer in 2021. Population in Madrid The population in the Community of Madrid soared between the 1990s and 2010, growing from 5 to nearly 6.5 million inhabitants in about 15 years, as it became an attractive destination for both national and foreign immigrants. Nevertheless, the Spanish financial crisis led many foreigners to move out of the region, and the number of foreign nationals fell from over *********** in 2009 to approximately ******* in 2017. By 2024, this figure had recovered and was over the numbers registered before the crisis. As of 2022, the most common foreign nationalities in the Community of Madrid were Romanian, Moroccan and Venezuelan. Together, inhabitants from these countries totaled roughly *******.

The statistic depicts Australia's gross domestic product (GDP) from 1987 to 2024, with projections up until 2030. In 2024, GDP in Australia amounted to about 1.8 trillion US dollars. See global GDP for a global comparison. Australia’s economy and population Australia’s gross domestic product has been growing steadily, and all in all, Australia and its economic key factors show a well-set country. Australia is among the countries with the largest gross domestic product / GDP worldwide, and thus one of the largest economies. It was one of the few countries not severely stricken by the 2008 financial crisis; its unemployment rate, inflation rate and trade balance, for example, were hardly affected at all. In fact, the trade balance of Australia – a country’s exports minus its imports – has been higher than ever since 2010, with a slight dip in 2012. Australia mainly exports wine and agricultural products to countries like China, Japan or South Korea. One of Australia’s largest industries is tourism, which contributes a significant share to its gross domestic product. Almost half of approximately 23 million Australian residents are employed nowadays, life expectancy is increasing, and the fertility rate (the number of children born per woman) has been quite stable. A look at the distribution of the world population by continent shows that Australia is ranked last in terms of population and population density. Most of Australia's population lives at the coast in metropolitan areas, since parts of the continent are uninhabitable. Unsurprisingly, Australia is known as a country with very high living standards, four of its biggest cities – Melbourne, Adelaide, Sydney and Perth – are among the most livable cities worldwide.

IntroductionThe first wave of the COVID-19 pandemic saw the reconfiguration of perinatal and maternity services, national lockdowns, and social distancing measures which affected the perinatal experiences of new and expectant parents. This study aimed to explore the occurrence of postpartum anxieties in people who gave birth during the pandemic.MethodsAn exploratory concurrent mixed-methods design was chosen to collect and analyse the quantitative and qualitative data of an online survey during the first UK lockdown. The survey included the Postpartum Specific Anxiety Scale–Research Short Form–for use in global Crises [PSAS-RSF-C] psychometric tool, and open-ended questions in relation to changes in birth plans and feelings about those changes and giving birth in a pandemic. Differences in measured scores were analysed for the participant’s ethnicity, sexual orientation and disability using independent Student’s t-tests, and for age, the analysis was completed using Pearson’s correlation. Qualitative data from open-ended questions were analysed using a template analysis.ResultsA total of 1,754 new and expectant parents completed the survey between 10th and 24th April 2020, and 381 eligible postnatal women completed the psychometric test. We found 52.5% of participants reported symptoms consistent with a diagnosis of postnatal anxiety–significantly higher than the rates usually reported. Younger women and sexual minority women were more likely to score highly on the PSAS-RSF-C than their older or heterosexual counterparts (p

In 2024, the total population of Spain was around 48.38 million people. By 2029, it was forecast to grow up to 50.76 million inhabitants.

Population of Spain While Spain’s fertility rate has been relatively decreasing over the past decade, its year-over-year population growth has been increasing continuously since 2016. The collapse of the job and real estate markets may have led the Spanish to postpone having (more) kids or to migrate to other countries in search of a more stable economy, while inflow of migrates has increased . This theory is supported by data on the average age of Spain’s inhabitants; a look at the median age of Spain’s population from 1950 up until today shows that the Spanish get older on average – perhaps due to the aforementioned factors.

Economic recovery Speaking of Spain’s economy, economic key factors suggest that the country is still recovering from the crisis. Its gross domestic product (GDP) was in admirable shape prior to the collapse, but it still has not returned to its former glory. Only recently has Spain reported actual GDP growth since 2008. Nevertheless, during 2020 and the COVID-19 pandemic, Spain's GDP had a decrease of more than 11 percent. This in turn, led to an increase of the country’s unemployment rate after years of slowly but surely decreasing following an alarming peak of 26 percent in 2013. Future perspectives are, however, somewhat brighter, as GDP is forecast to maintain a positive growth rate at least until 2029, even exceeding two percentage points in 2025.

This statistic shows the total population of France from 2020 to 2024, with projections up until 2030. In 2024, the total population of France amounted to 68.44 million people. See the population of Italy for comparison. France's population Although the total French population has annually increased, population growth has been in a slump from 2006 to 2012. However, the decrease of population growth is seemingly irrelative to births in the country, primarily because France’s fertility rate has remained relatively steady over the past decade, based on information from 2011. Yearly population growth could potentially be attributed to a positive lifestyle in the country and a steady economic growth. France is ranked in the top 30 countries with the highest Human Development Index , also known as HDI, which is determined based on life expectancy at birth, literacy rate, education levels and gross national income per capita. France, in this case, was ranked 12th out of the top 20 countries with the highest life expectancy in 2011. From an economic standpoint, France has remained stable, despite several complications within the European Union. Since the 2008 financial crisis, France’s unemployment rate has increased and has experienced several swings year-to-year up until 2014. However, despite fluctuating unemployment rates, GDP growth has very slightly been on the rise on a yearly basis, ever since experiencing a dramatic drop in 2009. Additionally, the GDP itself has continuously been fluctuating since 2008), after enduring a continuous increase in the years prior.

The statistic shows the total population in Canada from 2020 to 2024, with projections up until 2030. In 2024, the total population in Canada amounted to about 41.14 million inhabitants. Population of Canada Canada ranks second among the largest countries in the world in terms of area size, right behind Russia, despite having a relatively low total population. The reason for this is that most of Canada remains uninhabited due to inhospitable conditions. Approximately 90 percent of all Canadians live within about 160 km of the U.S. border because of better living conditions and larger cities. On a year to year basis, Canada’s total population has continued to increase, although not dramatically. Population growth as of 2012 has amounted to its highest values in the past decade, reaching a peak in 2009, but was unstable and constantly fluctuating. Simultaneously, Canada’s fertility rate dropped slightly between 2009 and 2011, after experiencing a decade high birth rate in 2008. Standard of living in Canada has remained stable and has kept the country as one of the top 20 countries with the highest Human Development Index rating. The Human Development Index (HDI) measures quality of life based on several indicators, such as life expectancy at birth, literacy rate, education levels and gross national income per capita. Canada has a relatively high life expectancy compared to many other international countries, earning a spot in the top 20 countries and beating out countries such as the United States and the UK. From an economic standpoint, Canada has been slowly recovering from the 2008 financial crisis. Unemployment has gradually decreased, after reaching a decade high in 2009. Additionally, GDP has dramatically increased since 2009 and is expected to continue to increase for the next several years.

This statistic shows the total population of Greece from 2020 to 2024, with projections up until 2030. In 2024, the total population of Greece was around 10.4 million people. Population of Greece After a subtle year-over-year increase from 2004 to 2011, the population of Greece has experienced a slight drop from 2011 until 2014. Population growth decreased marginally in 2011 compared to the previous year, and once again in 2012 in comparison to 2011. Greek women also bore fewer children per woman on average in 2011, a slight decrease from 2010. But a lower fertility rate is not necessarily the only reason for the country’s total population decline, Greece’s recent economic downturn also plays a role. Due to poor decisions in regards to spending made by the government, Greece has suffered through an economic crisis since 2010, diminishing the incentive to live in the country. The unemployment rate dramatically surged since the crisis, reaching a decade high in 2013. Additionally, the country’s GDP has significantly dropped in the same time frame from 2008 to 2013, with the largest slump in GDP growth occurring in 2011. Despite a severe economic slump, Greece still managed to maintain a relatively high HDI value in 2012, preserving a spot among the top 30 countries worldwide. The HDI, or Human Development Index, is based on parameters such as literacy rate, education levels, GNI and life expectancy, which was one of the highest in the world in 2011.

This statistic shows the population growth in Iceland from 2013 to 2023. In 2023, Iceland's population increased by approximately 2.93 percent compared to the previous year. Iceland's recovery Population growth in Iceland took a nose dive after the economic crisis of 2008; in 2007, the population growth rate was as high at 2.53 percent, but by 2010 it had dipped into the red figures. One reason for this may be that during the economic crisis unemployment went up, which may have caused some Icelanders to leave the country in search of work elsewhere, or reducing so-called economic migration into the country, as Iceland had been experiencing significant economic strength before the crisis. GDP growth did not begin to recover until 2011. Also, interestingly, the year after the crisis, the fertility rate went up slightly, but not for long - the fertility rate is now below the natural replacement rate. Iceland views childcare as a state responsibility, and most children attend daycare at a young age allowing both parents the option to work if they desire to do so. This is most likely possible because the total Icelandic population is actually quite small. As few as 330,000 people inhabit the island as of 2015, so maintaining the number of inhabitants while keeping the economy running and stable is of particular importance. Icelandic people also live a long time, due to a high standard of living, and life expectancy is on average 82 years of age - one of the highest life expectancies in the world.

After having decreased by 0.5 percent due to increasing emigration after the financial crisis in 2009, the annual population growth in Iceland has been positive since 2010. In 2022, the country's population increased by around three percent. At the beginning of 2022, the population of Iceland was 387,758 inhabitants.

Migration

One reason behind Iceland's growing population is immigration to Iceland. The number peaked in 2017, when nearly 15,000 people immigrated to Iceland. A high number of the immigrants who arrived in Iceland in 2021 came from other European countries, the largest group coming from Poland.

Decreasing fertility rate

While the number of births in Iceland increased slightly over recent years after having fallen until 2016, the fertility rate decreased over the last decade. In 2021, the fertility rate in Iceland was 1.82 children per woman. Despite this, Iceland's birth rate is roughly double its death rate, which results in natural population growth.

Prior to 1829, the area of modern day Greece was largely under the control of the Ottoman Empire. In 1821, the Greeks declared their independence from the Ottomans, and achieved it within 8 years through the Greek War of Independence. The Independent Kingdom of Greece was established in 1829 and made up the southern half of present-day, mainland Greece, along with some Mediterranean islands. Over the next century, Greece's borders would expand and readjust drastically, through a number of conflicts and diplomatic agreements; therefore the population of Greece within those political borders** was much lower than the population in what would be today's borders. As there were large communities of ethnic Greeks living in neighboring countries during this time, particularly in Turkey, and the data presented here does not show the full extent of the First World War, Spanish Flu Pandemic and Greko-Turkish War on these Greek populations. While it is difficult to separate the fatalities from each of these events, it is estimated that between 500,000 and 900,000 ethnic Greeks died at the hands of the Ottomans between the years 1914 and 1923, and approximately 150,000 died due to the 1918 flu pandemic. These years also saw the exchange of up to one million Orthodox Christians from Turkey to Greece, and several hundred thousand Muslims from Greece to Turkey; this exchange is one reason why Greece's total population did not change drastically, despite the genocide, displacement and demographic upheaval of the 1910s and 1920s. Greece in WWII A new Hellenic Republic was established in 1924, which saw a decade of peace and modernization in Greece, however this was short lived. The Greek monarchy was reintroduced in 1935, and the prime minister, Ioannis Metaxas, headed a totalitarian government that remained in place until the Second World War. Metaxas tried to maintain Greek neutrality as the war began, however Italy's invasion of the Balkans made this impossible, and the Italian army tried invading Greece via Albania in 1940. The outnumbered and lesser-equipped Greek forces were able to hold off the Italian invasion and then push them backwards into Albania, marking the first Allied victory in the war. Following a series of Italian failures, Greece was eventually overrun when Hitler launched a German and Bulgarian invasion in April 1941, taking Athens within three weeks. Germany's involvement in Greece meant that Hitler's planned invasion of the Soviet Union was delayed, and Hitler cited this as the reason for it's failure (although most historians disagree with this). Over the course of the war approximately eight to eleven percent of the Greek population died due to fighting, extermination, starvation and disease; including over eighty percent of Greece's Jewish population in the Holocaust. Following the liberation of Greece in 1944, the country was then plunged into a civil war (the first major conflict of the Cold War), which lasted until 1949, and saw the British and American-supported government fight with Greek communists for control of the country. The government eventually defeated the Soviet-supported communist forces, and established American influence in the Aegean and Balkans throughout the Cold War. Post-war Greece From the 1950s until the 1970s, the Marshall Plan, industrialization and an emerging Tourism sector helped the Greek economy to boom, with one of the strongest growth rates in the world. Apart from the military coup, which ruled from 1967 to 1974, Greece remained relatively peaceful, prosperous and stable throughout the second half of the twentieth century. The population reached 11.2 million in the early 2000s, before going into decline for the past fifteen years. This decline came about due to a negative net migration rate and slowing birth rate, ultimately facilitated by the global financial crisis of 2007 and 2008; many Greeks left the country in search of work elsewhere, and the economic troubles have impacted the financial incentives that were previously available for families with many children. While the financial crisis was a global event, Greece was arguably the hardest-hit nation during the crisis, and suffered the longest recession of any advanced economy. The financial crisis has had a consequential impact on the Greek population, which has dropped by 800,000 in 15 years, and the average age has increased significantly, as thousands of young people migrate in search of employment.

From now until 2100, India and China will remain the most populous countries in the world, however China's population decline has already started, and it is on course to fall by around 50 percent in the 2090s; while India's population decline is projected to begin in the 2060s. Of the 10 most populous countries in the world in 2100, five will be located in Asia, four in Africa, as well as the United States. Rapid growth in Africa Rapid population growth across Africa will see the continent's population grow from around 1.5 billion people in 2024 to 3.8 billion in 2100. Additionally, unlike China or India, population growth in many of these countries is not expected to go into decline, and instead is expected to continue well into the 2100s. Previous estimates had projected these countries' populations would be much higher by 2100 (the 2019 report estimated Nigeria's population would exceed 650 million), yet the increased threat of the climate crisis and persistent instability is delaying demographic development and extending population growth. The U.S. as an outlier Compared to the nine other largest populations in 2100, the United States stands out as it is more demographically advanced, politically stable, and economically stronger. However, while most other so-called "advanced countries" are projected to see their population decline drastically in the coming decades, the U.S. population is projected to continue growing into the 2100s. This will largely be driven by high rates of immigration into the U.S., which will drive growth despite fertility rates being around 1.6 births per woman (below the replacement level of 2.1 births per woman), and the slowing rate of life expectancy. Current projections estimate the U.S. will have a net migration rate over 1.2 million people per year for the remainder of the century.

Andalusia, with a total number of 8.6 million inhabitants, ranked first on the list of most populous autonomous communities in Spain as of January 1st, 2025. The least populated regions of Spain were the two autonomous cities of Ceuta and Melilla, both with a population of under 90,000 inhabitants that year. The population of Spain has been increasing for many years after experiencing a downward trend between 2012 and 2015, and is projected to grow by nearly half a million by 2027. The population of Spain is dying more than being born Spain has one of the lowest fertility rate in the European Union, with barely 1.29 children per woman. According to the most recent data, more people died in Spain than were being born in 2023, with figures reaching over 434,000 deaths versus 320,000 newborns. Immigration countered this trend One of the key points to balance out this population downtrend in Spain is immigration. Spain’s immigration figures finally started to pick up in 2015 after a downward trend that presumably initiated after the 2008 financial crisis. Nevertheless, Spaniards still migrate is much larger numbers than before the crisis. According to the latest data, nationals aged between 25 and 34 years represented the largest bulk of emigrants.