is a 74 percent increase in the number of twin births from 1980.
of having more than one baby at a time is 1 in 33 (3%) in the United
church is 1 in 50 (2%).
there is a 3% chance of having a multiple birth at age 25-29, it increases
to 4% at 30-34 years and almost 5% at 35-39 years.
that can increase chances of having twins are also:
a maternal family history of multiple births (fraternal),
*Using fertility treatments (in vitro fertilization or fertility drugs).
(multiples are more common in African Americans and least common in
Hispanics and Asians)
of pregnancies (the chance of having twins increases with each pregnancy),
to have had twins