In 2023, around 79 births per 1,000 live births among mothers aged 45 to 54 years were twin births. This statistic illustrates twin birth rates in the United States in 2023, distributed by age of mother.

In the United States, non-Hispanic Black women currently have higher rates of twin births than any other ethnicity or race with **** per 1,000 live births being twins. There are two types of twins, identical and fraternal. Identical twins form when one fertilized egg splits and develops two babies, while fraternal twins form from two eggs that are fertilized by two sperm. Fraternal twins, although born at the same time, are no more alike than siblings born at different times. Twin births in the United States The birth rate for twins in the United States has increased over the past few decades, with around **** twin births per 1,000 live births in 2023. Factors that increase the odds of having a twin birth include race, genetics, the number of previous pregnancies, assisted reproductive techniques, and the age of the mother. Those aged 45 to 54 years have a significantly higher twin birth rate than younger women in the United States. The states with the highest average twin birth rates include Michigan, Mississippi, and Connecticut. Birth rates in the United States As is the case in many other developed countries, the birth rate in the United States has steadily decreased. In 2023, there were just **** births per 1,000 population, compared to **** births per 1,000 population in the year 1990. Unsurprisingly, the birth rate is highest among women aged 20 to 34 years, however women are increasingly having birth later in life.

Multiple births in England and Wales occurs, by far, the most frequent among mothers aged 45 years and over. In 2022, mothers over 45 years of age gave birth to, on average, ** multiple births (twins, triplets or more) per 1,000 pregnancies. This statistic displays the multiple birth (twins, triplets or more) rate in England and Wales in 2022, by age of mother.

BackgroundResearch on community (home or birth center) twin birth is scarce. This study evaluates outcomes of twin pregnancies entering care with a single community practitioner.MethodsThis is a retrospective observational cohort study of 100 consecutive twin pregnancies planning community births during a 12-year period. Outcomes measured included mode of birth; birth weights; Apgar scores; ante-, intra-, and post-partum transports; perineal integrity; birth interval; blood loss; chorionicity; weight concordance; and other maternal or neonatal morbidity.Results31 women (31%) transferred to a hospital-based clinician prior to labor. Of the 69 pregnancies still under the obstetrician’s care when labor began, 79.7% (n = 55) were Dichorionic Diamniotic and 21.3% (n = 14) were Monochorionic Diamniotic. The vaginal birth rate was 91.3% (n = 63): 77.3% for primips and functional primips (no previous vaginal births) and 97.9% for multips. Six mothers (8.7%) had in-labor cesareans (1 multip and 5 primips). Rates of vaginal birth did not vary significantly by chorionicity. There were 8 transports in labor (11.6%): 2 vaginal and 6 cesareans. Average gestational age was 39.0 weeks (range 35–42). Compared to primiparas, multiparas had less perineal trauma and higher rates of vaginal birth and spontaneous vaginal birth. One twin infant and one mother required postpartum hospital transport. Of the babies born in a community setting, there was no serious morbidity requiring hospital treatment.ConclusionsA community birth can lead to high rates of vaginal birth and good outcomes for both mothers and babies in properly selected twin pregnancies. Community twin birth with midwifery style care under specific protocol guidelines and with a skilled practitioner may be a reasonable choice for women wishing to avoid a cesarean section—especially when there is no option of a hospital vaginal birth. Training all practitioners in vaginal twin and breech birth skills remains an imperative.

Number and percentage of live births, by characteristics of the mother (age, parity, marital status, birthplace) and child (sex, single or multiple births, birth weight) based on weeks of gestation, 2000 to most recent year.

The Human Multiple Births Database (HMBD) gathers the number of twin births and the twinning rates for countries with reliable statistics. The database also provides statistics on other multiple births (i.e., triplets, quadruplets, etc.) whenever possible. As of 06/10/2022, the HMBD includes data for 25 countries. For each country, data go back as far into the past as possible and extend until the most recent year with available data. Data for each country are updated anually, if possible. The HMBD is available online at: https://www.twinbirths.org/en/ Here, in this figshare data deposit, you will find a static version of the HMBD as of 06/10/2022 (please refer to the "readme.txt" file for a detailed explanation of the contents of this deposit).

This dataset presents the rate of multiple births by number of fetuses—distinguishing between twin births and triplet (or higher order) births—across European countries during 2015. Multiple births are associated with higher risks for both mothers and babies, including preterm birth and low birth weight. Tracking the frequency of multiple gestations helps inform health system planning, clinical risk management, and maternal–newborn care services. Data are sourced from the Euro-Peristat project, which provides harmonised, comparable perinatal health statistics across Europe.Data Source:EuroPeristat: https://www.europeristat.com/This is one of many datasets featured on the Midwives’ Data Hub, a digital platform designed to strengthen midwifery and advocate for better maternal and newborn health services.

Data set containing information about matched sets of twins, triplets, and quadruplets on cd-rom. Background The Matched Multiple Birth Data Set is maintained by the National Center for Health Statistics. The Matched Multiple Birth Data Set allows for unique analysis of birth set data because it links birth sets together generating data about gender among the set, birth weight among the set, and outcomes among the set. Included on the file are 325,516 sets of twins; 12,157 sets of triplets; and 760 sets of quadruplets User functionality Data is presented in Cd- rom. The data was collected over six years and 98% of the records are of matched sets. All of the data is from the United States. Data Notes For more information on this cd-rom, contact: Reproductive Statistics Branch National Center for Health Statistics 3311 Toledo Road, Room 7318 Hyattsville, Maryland 20782 Telephone: (301) 458-4362 or (301) 458-4111

Number of live births and fetal deaths (stillbirths), by type of birth (single or multiple), 1991 to most recent year.

Annual live births in England and Wales by sex, birthweight, gestational age, ethnicity and month. Maternities by place of birth and with multiple births. Stillbirths by age of parents and calendar quarter.

Study question: Do the mothers of twins and singletons differ regarding post-partum and old-age mortality?

Summary answer: Mothers of twins had twice as high post-partum mortality as mothers of singletons; survival of twinners was higher than survival of the mothers of singletons after the 67^th lifespan percentile.

What is known already: Twinning is typically associated with higher post-partum maternal mortality. The evidence about whether twinning incurs long-term survival costs of reproduction or is a trait pertinent to long-lived women is scarce and contradictory.

Study design, size, duration: The study is based on the data of the Estonian Family Register (operating from 1926-43) and involves 5 565 mothers of twins and 119 613 mothers of singletons born between 1850-99. The subset for comparing maternal lifespans included 1 703 – 1 884 mothers of twins and 19 747 – 36 690 mothers of singletons.

Participants/materials, setting, methods: Post-partum maternal mortality was analysed in the whole sample (including mothers of a single child) by logistic regression. Most of the analyses were performed in samples where each mother of twins was matched against mothers of singletons based on parity, urban versus rural origin, whether their lifespan was known, date of birth and age at first birth. Quantile regression was used to analyse age-dependent variations in maternal mortality rates. Lifespans were compared in linear mixed models. All models were adjusted for relevant biodemographic covariates.

Main results and the role of chance: The twinning rate in the whole sample was 4.4%. During the year after giving birth, maternal mortality for multiple gestations was 0.75% (17/2 273) and 0.37% (449/122 750) for single gestations (OR = 2.05, 95% CI = 1.21 – 3.23). The association between twinning and post-natal maternal mortality remained significant in a model controlling for parity and age of first and last birth. The life spans of the mothers of twins and singletons did not differ in matched samples. Past the 67^th lifespan percentile, the odds of survival were significantly higher for mothers of twins than mothers of singletons, as indicated by non-overlapping 95% confidence intervals.

Limitations, reasons for caution: Relatively low number of individuals (22 802) with known age at death due to discontinuation of the register after 1943.

BackgroundShenzhen has the largest and youngest foreign population among all cities in China. The reproductive health of pregnant women from different backgrounds is a social issue that deserves attention. In the past decade, China has liberalized its population policies to stimulate population growth, and the proportion of multiple births has continued to increase.MethodThis retrospective cohort included 526,654 newborns born in Baoan, Shenzhen, from January 1, 2009, to December 31, 2019, including 515,016 singletons and 11,638 twins or triplets. Univariate regression models were used to analyze the effects of maternal sociodemographic characteristics, physiological characteristics, medical history, antenatal care and other factors associated with single vs. multiple births and to elucidate the changing trends of different factors affecting multiple births in the past 11 years. Additionally, fetal development in multiple births was analyzed by generalized linear mixed models.ResultsThe rates of pregnancy complications, preterm birth, and advanced-age pregnancy were significantly higher in the multiple birth mothers than in single birth mothers, and more multiple pregnancies were achieved through assisted reproductive technologies. The rates of adverse outcomes such as stillbirth, malformation, hypoxia, and ultralow body weight in multiple fetuses were significantly higher than that in singleton fetuses. The trend analysis from 2009 to 2019 showed that the socioeconomic status and health level of mothers with multiple births improved over time, and the risk during pregnancy generally decreased. Simultaneously, the development indicators of multiple fetuses have improved year by year, and the proportion of adverse outcomes has also decreased significantly. A low pre-natal care utilization rate was shown to be detrimental to the development of multiple fetuses. Independent risk factors for hypoxia and very low birth weight were also identified. The differences in secular trends between two birth groups were further revealed by time series models.ConclusionThis study presented a comprehensive survey of multiple pregnancies in the area with the largest population inflow in China. This study identified the factors that affect the health of multiple birth mothers and their fetuses, particularly suggesting that preterm birth rates and the use of assisted reproduction remain high. The findings provide a basis for the formulation of individualized pre-natal care, assisted reproductive guidance and healthcare policies for multiple births.

Bhalotra, Sonia, and Clarke, Damian, (2019) "Twin Birth and Maternal Condition." Review of Economics and Statistics 101:5, 853-864.

Key figures on fertility, live and stillborn children and multiple births among inhabitants of The Netherlands.

Available selections: - Live born children by sex; - Live born children by age of the mother (31 December), in groups; - Live born children by birth order from the mother; - Live born children by marital status of the mother; - Live born children by country of birth of the mother and origin country of the mother; - Stillborn children by duration of pregnancy; - Births: single and multiple; - Average number of children per female; - Average number of children per male; - Average age of the mother at childbirth by birth order from the mother; - Average age of the father at childbirth by birth order from the mother; - Net replacement factor.

CBS is in transition towards a new classification of the population by origin. Greater emphasis is now placed on where a person was born, aside from where that person’s parents were born. The term ‘migration background’ is no longer used in this regard. The main categories western/non-western are being replaced by categories based on continents and a few countries that share a specific migration history with the Netherlands. The new classification is being implemented gradually in tables and publications on population by origin.

Data available from: 1950 Most of the data is available as of 1950 with the exception of the live born children by country of birth of the mother and origin country of the mother (from 2021, previous periods will be added at a later time), stillborn children by duration of pregnancy (24+) (from 1991), average number of children per male (from 1996) and the average age of the father at childbirth (from 1996).

Status of the figures: The 2023 figures on stillbirths and (multiple) births are provisional, the other figures in the table are final.

Changes per 17 December 2024: Figures of 2023 have been added. The provisional figures on the number of live births and stillbirths for 2023 do not include children who were born at a gestational age that is unknown. These cases were included in the final figures for previous years. However, the provisional figures show a relatively larger number of children born at an unknown gestational age. Based on an internal analysis for 2022, it appears that in the majority of these cases, the child was born at less than 24 weeks. To ensure that the provisional 2023 figures do not overestimate the number of stillborn children born at a gestational age of over 24 weeks, children born at an unknown gestational age have now been excluded.

When will new figures be published? Final 2023 figures on the number of stillbirths and the number of births are expected to be added to the table in de third quarter of 2025. In the third quarter of 2025 final figures of 2024 will be published in this publication.

Annual changes in number of total live births, multiple births, and multiple birth rate in Korea (2009–2015).

This dataset presents information on the percentage of live births over a given year that are multiple (i.e. the birth of two or more offspring produced in the same gestation period).

Here is a statistic that proposes to discover the rate of premature deliveries in France in 2016, according to the type of birth. That year, about *** percent of women who had one or more children gave birth after less than 37 weeks of pregnancy. About half of the twin births were premature deliveries.

CATSS18 - The Child and Adolescent Twin Study in Sweden (18 years)

Overview CATSS

The Child and Adolescent Twin Study in Sweden (CATSS) is an ongoing longitudinal twin study that targets all twins born in Sweden since July 1, 1992. Since 2004, parents of twins have been interviewed about the children's somatic and mental health and social environment in connection with their 9th birthday (CATSS9). At ages 15 (CATSS15) and 18 (CATSS18), twins and parents complete a web questionnaire that, in addition to assessments of somatic and mental health, includes measures of personality development and psychosocial adaptation. At the age of 24 (CATSS24), only twins participate in a web survey that mainly focuses on mental health.

CATSS18: CATSS18 started in 2011. The study includes all 18-year-old twins and their parents, regardless of their participation in CATSS9 or CATSS15. The response rate is 50% for the twin survey and 40% for the parent survey. The sample comprises both identical (monozygotic) and fraternal (dizygotic) twins, including same-sex and opposite-sex pairs. The total number of participating twins (through parent and/or twin participation) is currently 20,400 out of 35,800 invited twins (December 2024). The combined response rate is 57%. Participants who have not yet provided a DNA sample via saliva are requested to do so. The saliva sample is used for zygosity determination and genotyping. Currently, 12,700 twins have been genotyped in CATSS18 (December 2024).

The question areas in the CATSS18 surveys are listed below. For detailed information about variables, visit strdata.se.

Question areas in parent survey:

ABCL - Adult Behavior Checklist A-TAC - Autism - Tics, ADHD and other Comorbidities inventory (only Autism-questions) Demography Asthma Eating disorders LEC - Life Events Checklist LSC-R - Life Stressor Checklist MDQ - Mood Disorder Questionnaire PCR - Parent Child Relationship PPCP - Parents' Perception of Child's Peers PLE - Psychotic-like Experiences Parents physical activity Social Interventions Spare Time Activities

Question areas in twin survey:

AUDIT - Alcohol Use Disorders Identification Test A-TAC - Autism - Tics, ADHD and other Comorbidities inventory (only Autism-questions) BOCS - Brief Obsessive Compulsive Scale CES-D - Center for Epidemiologic Studies Depression Scale CMRS- Child Mania Rating Scale Demography DAWBA - Development and Well-Being Assessment DUDIT - Drug Use Disorders Identification Test DSM-IV Criteria for Major Depressive Episode DCQ - Dysmorphic Concerns Questionnaire EDI-2 - Eating Disorder Inventory - 2 Friends' Behavior HRS-I - Hoarding Rating Scale-Interview LEC - Life Events Checklist LHA - Life History of Aggression LSC-R - Life Stressor Checklist- Revised Love Relationship MDQ - Mood Disorder Questionnaire Nicotine Use PCR - Parent Child Relationship Phobias Physical Activity PLE - Psychotic-like Experiences Premenstrual syndrome Quality of Friendship SCARED - Screen for Child Anxiety Related Emotional Disorders SRD - Self-Reported Delinquency Sexuality Social Interventions Spare Time Activities Synesthesia TCI - Temperament and Character Inventory YPI - Youth Psychopathic Traits Inventory Weight & height

About this dataset

Context

The dataset tabulates the data for the Twin, AL population pyramid, which represents the Twin population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates. It lists the male and female population for each age group, along with the total population for those age groups. Higher numbers at the bottom of the table suggest population growth, whereas higher numbers at the top indicate declining birth rates. Furthermore, the dataset can be utilized to understand the youth dependency ratio, old-age dependency ratio, total dependency ratio, and potential support ratio.

Key observations

• Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Twin, AL, is 28.1.
• Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Twin, AL, is 35.3.
• Total dependency ratio for Twin, AL is 63.4.
• Potential support ratio, which is the number of youth (working age population) per elderly, for Twin, AL is 2.8.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

Age groups:

• Under 5 years
• 5 to 9 years
• 10 to 14 years
• 15 to 19 years
• 20 to 24 years
• 25 to 29 years
• 30 to 34 years
• 35 to 39 years
• 40 to 44 years
• 45 to 49 years
• 50 to 54 years
• 55 to 59 years
• 60 to 64 years
• 65 to 69 years
• 70 to 74 years
• 75 to 79 years
• 80 to 84 years
• 85 years and over

Variables / Data Columns

• Age Group: This column displays the age group for the Twin population analysis. Total expected values are 18 and are define above in the age groups section.
• Population (Male): The male population in the Twin for the selected age group is shown in the following column.
• Population (Female): The female population in the Twin for the selected age group is shown in the following column.
• Total Population: The total population of the Twin for the selected age group is shown in the following column.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Twin Population by Age. You can refer the same here

The global twin zygosity DNA testing market is experiencing robust growth, driven by increasing demand for accurate zygosity determination in various applications. The market's expansion is fueled by advancements in DNA testing technologies, leading to more accurate, affordable, and faster results. Clinicians utilize these tests to inform medical management for twins, particularly concerning potential health risks unique to identical twins (monozygotic) like twin-to-twin transfusion syndrome or shared genetic conditions. Furthermore, the rising awareness among parents about the importance of early identification of zygosity is contributing significantly to market growth. Research applications are also emerging as key drivers, with studies utilizing twin zygosity data to understand genetic and environmental influences on various traits and diseases. While the market faces certain restraints, such as the cost associated with DNA testing and regulatory hurdles in some regions, these are being mitigated by increasing affordability and streamlined regulatory approvals. The segmentation by sample type (saliva and blood) and application (hospitals, testing organizations, and others) reflects the diversity of the market, offering diverse opportunities for different players within the industry. Growth is expected to be particularly strong in regions with high birth rates and established healthcare infrastructures, such as North America and Europe, followed by a steady expansion in other regions. The predicted CAGR (assuming a reasonable CAGR of 15% based on industry trends and the provided historical period) indicates a significant market expansion throughout the forecast period. The competitive landscape is marked by a mix of established players and emerging companies offering a range of testing services. This competitive environment is stimulating innovation, leading to the development of more convenient and cost-effective DNA testing kits. The increasing adoption of at-home testing kits, combined with technological advancements offering faster turnaround times and improved accuracy, are further shaping the market. Strategic partnerships and acquisitions are anticipated to become prominent strategies adopted by market participants seeking consolidation and diversification. The long-term growth prospects for the twin zygosity DNA testing market remain promising, driven by the rising prevalence of twin births globally, advancements in genetic research, and growing demand for personalized medicine.