If you’re living in the US and are Black or White, you have a similar chance of having twins (with Black moms having a slightly higher chance).
In 2009, 7 percent of all births to women aged 40 and over were born in a twin delivery compared with 5 percent of births to women aged 35–39, and 2 percent of births to women under age 25.
Overall, mothers of fraternal (non-identical) twins are four times more likely to have twins if they get pregnant again, compared with the rest of the population.
For example, if you had your first set of twins at 25 and you’re now pregnant at 39, you’re even more likely to have twins than before.