When is the first polar body extruded? A. 24 hrs prior to ovulation B. Accompanied by ovulation C.48 hours prior D. At the time of fertilisation
If it is B, please post a reason and reference for saying so. It is clear that LH surge occurs 36 hrs before ovulation...and that meiosis 1 is completed immediately after that.
Just to substantiate my answer, for IVF, to extract the Secondary oocyte, extraction is done before the predicted time of ovulation. Which means the secondary oocyte has already formed and polar body already extruded. The second polar body then degenerates.
Accompanied with ovulation
The cell that is ovulated is definitely the Secondary oocyte. The LH surge which occurs 36 hours before ovulation stimulates the primary oocyte to complete Meiosis - I, and this means the First Polar body for sure, is extruded in the period between the two. The best answer here must be A. 24 hours before ovulation.
This was confirmed by during both the OBG as well as the Anat lectures.
In Punit the answer is given as B but in across for anatomy and according to what anatomy sir told the ans is A
Accompanied by ovulation