You are going in correct way. Chances of conception are 25% per ovulatory cycle. Better option is to induce ovulation with some tablets which your doctor will prescribe. Its better to have relation at least on alternate days OR three times in week, irrespective of follicle size for better chances of conception. Also ultrasound
doesn't detect all follicular ruptures. Its very rare for follicle not to rupture after Fertigyn
injection So no need to worry for follicular rupture.
Wish you good health.