Twin birth rates in the United States 1980-2021, by ethnicity
In the United States, non-Hispanic black women currently have higher rates of twin births than any other ethnicity or race. 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 31.2 twin births per 1,000 live births in 2021. 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 U.S. The states with the highest average twin birth rates include Connecticut, Michigan, and South Dakota.
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 2019, there were around 11.4 births per 1,000 population, compared to 16.7 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.
Twin births in the United States
The birth rate for twins in the United States has increased over the past few decades, with around 31.2 twin births per 1,000 live births in 2021. 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 U.S. The states with the highest average twin birth rates include Connecticut, Michigan, and South Dakota.
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 2019, there were around 11.4 births per 1,000 population, compared to 16.7 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.
