Dear vidya, Irregular periods can be due to a number of reasons. You mentioned that you had ovarian drilling and repair of blocked tubes. Did they mention that you also have endonetriosis?? Is your prolactin levels normal. How much thyroid tablets are you taking and how is your thyroid function tests. Did they check your tube patency after removing the blocks in tubes?? what is your height and weight and are you physically active. ?? It is really important to remain in healthy weight and to do regular exercise for pcos. You have also mentioned your husbands sperm count. Not too bad. But what s the morphology and motility ?? The doctor has suggested ICSI which means they will inject the sperm directly to ovum and deposit it on your uterus. This is useful for male factor problems Now a days ICSI is combined with IVF. Have you had IUI in the past??