hello doc this is neha age 25, married for last 3 yeas, patient of pco's trying to conceive for last 6 mnths. my follicles growth is not nomal so taking fostien injuction for that. last month it reaches to - follicular study day-13 ,endometrial thickness-8.5mms, right follicle-6 mm and left follicle 17*18. till i didnt get pregnant. and this mont my follicular scan shows 15 *16 mm on 16t day and on 18th day it shows "regressed". what is it?