I was consulting a doctor.. I was asked to scan on the 11th day there were two follicles on each ovaries which were 18*18 and 18*14 but my endometrium thickness was 1.7 mm.iwas given an injection for the follicles to rupture but I was unable to be pregnant.I ve a son whose4 years old.now why I am unable to be pregnant.please give me some suggestions

There's really no way for anyone to give a diagnosis online.

This is something that's best discussed with your doctor, or a fertility specialist.