<prompt> Most common twin after assisted reproduction:MonozygoticAcardiac twinDizygotic twinConjoined twin  <response>: Ans. c. Dizygotic twinRef: Williams Obstetrics 24th Ed; Page No-274Dizygotic twins are most common.Identifiable risk factors include by race, geography, family history, or ovulation induction.Risk of twinning is up to 10 with clomiphene citrate and up to 30 with human menopausal gonadotropin.Monozygotic twins have no identifiable risk factors.MULTIPLE PREGANCY FLOW-CHART 