Hallow Dear, Usually, after hCG injection, the follicle ruptures within 24 hours. You have noticed that the follicle was unruptured at 9:00 am; however at 11:00 am, you had some abdominal cramps. It is very likely that this pain was due to egg release (ovulation). It may sometimes be associated with little bleeding also. This is known as Mittelschmerz. The size of the follicle just before the ovulation was 20.5 mm. This is most ideal size of the follicle. Follicles of size between 18 mm and 21 mm produce most healthy eggs which have best pregnancy chances. You had intercourse at the time of ovulation. Sexual relations on the day of ovulation and then at least every alternate day are very productive in terms of pregnancy. You may confirm the rupture of follicle by ultrasonography. Wait for your menses. If you miss them, perform pregnancy test on overnight first morning urine sample after a week; done earlier, the results may be false negative. Alternatively you may opt for Beta hCG test 10 days after your intercourse. Then report to your Gynaecologist. I hope this helps you. Dr. Nishikant Shrotri So considering all these facts, you have very good chances of pregnancy.