Hello, Ovulation is either absent or deficient in PCOD. Fertigyn helps to accelerate ovulation while Evatone contains estrogen that is helpful in building up the endometrium suitable for implantation. Your doctor may try different combinations to ensure ovulation and this may take time. When such medications are being taken there is the possibility of hyper stimulation of the ovary and this should be closely monitored. Also, loss of excess body weight is very much useful in correcting the hormonal imbalance. Hope this information is useful to you. Good luck.