Took letrozole 5mg (CD3-CD7) and on CD12 found one 22~mm follicle on the left ovary. Took a trigger eema 10,000 injection on the same evening. Went for a scan on CD14 morning, and the follicle had not ruptured yet. The doctor said there could still be a chance so try on CD15 morning. And she asked me to come back next month when I get my periods. I had slight pain on the left side of my lower abdomen on CD16 evening. Could it be possible that the egg was released 3-4 days after the trigger shot. And if not what could be the reason for it not rupturing. I do have PCOS and hypothyroidism. Any advice is appreciated.