This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fetus Placenta & Fetal Membrane, Subject name: Gynaecology & Obstetrics
Weight of placenta and fetus are equal at: 
Select and explain. 
A. 14 weeks, B. 15 weeks, C. 17 weeks, D. 21 weeks
C: 17 weeks
Answer: C: 17 weeks 
Explanation: Ans. is c, i.e. 17 weeksRef Williams Obs 24/e p 95"In the first trimester, placental growth is more rapid than that of the fetus. But by approximately 17 post menstrual weeks, placental and fetal weights are approximately equal" Ref Williams 24/e, p 95