Hallow Dear, I believe your cycle is regular and between 28 to 30 days. Then, your egg release (ovulation) day would be somewhere between 14 to 16 day. The egg is released 14 days prior to the next expected menses. However, since you are on Clomiphene for induction of ovulation, this calculation is invalid. Your ultrasonography scan also suggests that you are quite close to ovulation. Usually, a healthy egg is released by follicle between the size of 18 mm to 21 mm. Though right ovarian follicle is smaller in diameter, your left ovary has got a good sized (20mm x 16mm) follicle. It may rupture any time to ovulate. May be you would be given Injection of hCG hormne for bringing about ovulation. Eggs released from follicle of size between 18 mm and 21 mm release the best quality eggs who have potency for successful pregnancy. However, your endometrial thickness is not up to the mark; it is just 5.5 mm thick. For successful implantation of fertilized ovum, endometrial thickness between 9 mm to 13 mm is most conducive. I do not feel this endometrium can give you a successful pregnancy. You are on Fertyl which is Clomiphene citrate. This medicine is used for induction of ovulation. However, due to its anti-oestrogenic action, it affects the endometrial growth adversely. According to my opinion, you should let this cycle pass without pregnancy. Since there is a problem in endometrial thickness, you should work on it by oestrogen preparations. Further more, colour Doppler study of endometrium will be more informative about the deeper layers of the endometrium. You should attempt the pregnancy when the follicle is between 18 mm to 21 mm in size and the endometrium is between 9 mm to 13 mm in thickness at the time of ovulation. May be, if endometrial growth is adversely affected by Clomiphene, you would require HMG/HCG protocol for ovulation if you cannot ovulate naturally. You have been put on Obimet, which is Metformin. It was (and is still) a belief that this medicine helps the ovulation better with Clomiphene citrate. However, the recent studies have shown that there is not much of a difference with or without Metformin; instead the use of Myo inositol has proved to be more successful with Clomiphene citrate. Please take the opinion of your infertility specialist before you attempt the pregnancy to avoid unsuccessful pregnancies or conceptions. I hope this helps you. Dr. Nishikant Shrotri