| http://www.w3.org/ns/prov#value | - On average, 20 to 25 percent of women who take fertility drugs or undergo in vitro fertilization or other assisted reproductive techniques end up carrying more than one baby.Other factors that influence the likelihood of having fraternal twinsOnce you have a set of fraternal twins, you are twice as likely to have another set in a future pregnancy.Fraternal twins run in families, so if you are a twin
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