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
Serum levels of different hormones estimated on day of ovulation will depict: 
Select and explain. 
A. | FSH, LH, Estrogen and progesterone, B. | FSH, LH, Estrogen and | progesterone, C. | FSH, LH, | Estrogen and Progesterone, D. | FSH, LH, | Estrogen and | Progesterone
A: | FSH, LH, Estrogen and progesterone
Answer: A: | FSH, LH, Estrogen and progesterone 
Explanation: Ans. is a, i.e. | FSH, | LH, | Estrogen and | ProgesteroneNow we know that just before ovulation there is LH & FSH surge so LH and FSH increase at the time of ovulation.Level of estrogen & progesterone are also raised. The levels of progesterone begin to rise and are maximum by Day 22 of cycle. See the graph below:"Immediately prior to ovulation, when theca interna begins to luteinize, and during luteal phase, the plasma progesterone level rises from 6nmol/L to 63nmol/L". Ref: Jeffcoates 9th/ed, p75