<s>[INST] Dear Dr.            I have been trying to conceive for  some time now.My doctor prescribed letroz to be taken from day 2 to dy 7 and follicular study from day 8.i went for the study today and the report says that the left ovary has multiple follicles with the largest one being 12.8mm.should i go on day 10 also?Till what day should i go for the follicular study?Today is day 8. [/INST] Hi, thanks for writing. Multiple follicle can be due to various causes, the most common being PCs. You need to get a follicular study repeated on day 10 and on every alternate day till the follicle size reaches 20 mm. It is the time you should have intercourse. A repeat scan needs to be done to see whether the follicle has ruptured. Then progesterone need to be taken for luteal phase support for 10 days. Hope I have answered your queries. Good day. </s>