What are the odds of having twins?
In recent years, multiple births have been on the rise. The number of twin births has increased by nearly 75 percent in the past 30 years. In the United States in 1980, only 18.9 sets of twins were born per 1,000 births. In 2018, 32.6 sets of twins were born per 1,000 births, according to a report on birth data.