About 1.8%: The incidence of natural fraternal-twin pregnancies in the U.S. Is about 1 in 70 (1.4%) and identical-twin pregnancies is about 1 in 250 (0.4%), for total odds of about 1.8%. This jumps to about 1 in 35 (almost 3%) if women using the help of reproductive medicine are included in the statistics. Odds increase with maternal age, number of past pregnancies, family history of twins, and other factors.
Answered 12/30/2018
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1/80: Twins occur approximately one out of every 80 births if you do not account for pregnancies by in vitro fertilization
Answered 12/31/2018
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A doctor has provided 1 answer
A doctor has provided 1 answer
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