In the U.S., Hispanic women generally have higher fertility rates and larger average family sizes compared to White, Black, Asian, or American Indian/Alaska Native women, with data from the March of Dimes and Pew Research showing Hispanics leading in fertility rates and large families. Black mothers also tend to have larger families than White or Asian mothers, who often have smaller families, though having two children is common across most groups, with Asians most likely to have exactly two.
In the United States, the highest fertility rates (per 1,000 women ages 15-44) during 2021-2023 (average) were to Hispanic women (64.4), followed by Blacks (55.2), Whites (52.5), American Indian/Alaska Natives (49.3) and Asian/Pacific Islanders (48.1).
Hispanics have the youngest, 27.6. Non-Hispanic blacks (32.9) and non-Hispanic Asians (35.9) also are younger than whites. Related to their younger age profiles, racial and ethnic minority groups also include a higher share of women in the prime child-bearing ages of 20-34.
In the United States during 2021-2023 (average), the multiple birth ratio (per 1,000 live births) was highest for Black infants (42.1), followed by Whites (33.1), American Indian/Alaska Natives (27.3), Hispanics (24.9) and Asian/Pacific Islanders (24.3).
Race. African-American people assigned female at birth are more likely to have twins than any other race. Asian Americans and Native Americans have the lowest rates for twins. White people assigned female at birth have the highest rate of higher-order multiple births (triplets or more).
Why The U.S. Government Wants Americans To Have More Kids
Why do Nigerians have so many twins?
Percy Nylander clarified many of the factors that contribute to this high incidence of twinning. His analyses of Nigerian placentation and zygosity have shown the increased rate of multiple pregnancy to be a result of higher proportions of dizygotic twins and trizygotic triplets as compared to Caucasian populations.
Some have found that married Black and Latina women are more likely to be infertile than White women 4,5. Black and Latina women are less likely to seek fertility treatment than their White counterparts 6. Also, Black women take more years to seek fertility treatment than White women 6.
The San people of southern Africa, who have lived as hunter-gatherers for thousands of years, are likely to be the oldest population of humans on Earth, according to the biggest and most detailed analysis of African DNA.
This makes Taiwan the least fertile country in the world, overtaking South Korea for the number 1 ranking. Do note that South Korea also achieved this 0.72 record low number in 2023, but has seen a slight increase since that year. Births in Taiwan fell for the 10th consecutive year, with 107,812 newborns in 2025.
The country with the highest birth rate according to the data is Niger. The fertility rate in Niger is 6.8 children per family. The next countries on the list with the highest fertility rate are Somalia and Chad, both located in Africa. Somalia and Chad have a birth rate of 6.3 children per family.
Fully half of Hispanic mothers have three or more kids, compared with 40% of blacks. About one-third (33%) of whites have three or more kids, and just 27% of Asian moms do.
The greatest officially recorded number of children born to one mother is 69, to the wife of Feodor Vassilyev (b. 1707–c. 1782), a peasant from Shuya, Russia. In 27 confinements she gave birth to 16 pairs of twins, seven sets of triplets and four sets of quadruplets.
In our study, black women had a significantly higher odds of ever having experienced infertility than white women. Even after adjustment for socioeconomic position, marital status, and other risk factors for infertility, this disparity persisted.
There is no scientific basis to claim that any particular ethnicity or race has "more dominant" genes than others. Genetic diversity exists within and across all human populations. All humans belong to the same species, Homo sapiens, and share the vast majority of their DNA sequence.
The Han Chinese are the world's largest single ethnic group, constituting over 19% of the global population in 2011. The world's most-spoken languages are English (1.132B), Mandarin Chinese (1.117B), Hindi (615M), Spanish (534M) and French (280M).
Native Americans had the least genetic diversity of all, indicating that part of the world was settled last. "Previously, we've been able to look at the genome and say, 'This part is from Africa, this is from Asia,'" explained Virginia research Andrew Singleton to Wired News.
Proportions of patients with described clinical conditions among different racial groups of patients. Results show significant differences for sperm concentration between different racial groups with Central/South Asian men exhibiting the highest values while Southeast Asians had the lowest (p < 0.0001) ( Figure 1a ).
Skin barrier function is reportedly stronger in darker skin tones (the stratum corneum is the skin barrier). Asian skin is reported to have similarities with Caucasian skin in terms of water loss and has the weakest barrier function.
A large prospective study showed that blacks had higher overall rates of malformations than whites; this difference was primarily due to an increase in minor malformations such as polydactyly, branchial clefts, and supernumerary nipples, whereas whites had higher rates of major malformations and multiple malformations ...
One of Africa's largest countries, Nigeria, has been nicknamed “The Land of Twins” by the BBC because it has the highest rate of twin births in the world. In Igbo Ora, in Oyo State in south west Nigeria, the rate is much higher, the last recorded figures revealed an average of 50 sets of twins in every 1,000 births.
After the intervention of Mary Slessor, a Scottish missionary in the 19th and early 20th century, the custom of killing twins considered taboo in many parts of Nigeria was gradually eradicated. However, one of the earliest recorded cases that legally addressed the issue was the 1944 case of R v. Ugo Chima.
