Superfetation secondary to ovulation induction with clomiphene citrate: a case report.

In conclusion, CC has been associated with an increased rate of multifetal pregnancy; however, after each induction cycle, pregnancy should be ruled out before start of a new induction cycle. This would prevent misinterpretations of the gestational age at delivery, and hence of maturity, and would also help prevent any potential malformation that may be caused by a yet undetected teratogenic effect of CC.