This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiology & Histology, Subject name: Gynaecology & Obstetrics
Most common twin after assisted reproduction: 
Select and explain. 
A. Monozygotic, B. Acardiac twin, C. Dizygotic twin, D. Conjoined twin
C: Dizygotic twin
Answer: C: Dizygotic twin 
Explanation: 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