<prompt> Serum levels of different hormones estimated on day of ovulation will depict:FSH, LH, Estrogen and progesteroneFSH, LH, Estrogen and progesteroneFSH, LH, Estrogen and ProgesteroneFSH, LH, Estrogen and Progesterone  <response>: 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 6nmolL to 63nmolL. Ref: Jeffcoates 9thed, p75 