This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathology of Conception, Subject name: Gynaecology & Obstetrics
Drug of choice for ovulation induction - 
Select and explain. 
A. Clomiphene, B. FSH, C. LH, D. Hcg
A: Clomiphene
Answer: A: Clomiphene 
Explanation: Ans. is 'a' i.e., Clomiphene o Ovulation should be induced with clomiphene citrate 50 mg/day from day 2 to day 6 of the cycle, for 5 days,o Dose can be increased upto lOOmg, if response is not satisfactory,o If clomiphene fails in 6-8 cycles, FSH & HCG Therapy is recommended.o To avoid peripheral suppressive oestrogenic action on cervical mucus & improve the fertility' rate, letrozole 2.5mg (non steroidal aromatase inhibitor) is found superior to clomiphene.