Hi. thanks for asking in Healthcare medicine.
Fertile medicine is Clomiphene
citrate given to increase sperm production. Follicular study
is done to assess the size of the mature follicle and to monitor the growth of the egg follicle. Ovulation releases the egg necessary for fertilization. In PCOD, the cycles are anovulatory creating problems in obtaining egg for IUI. Metformin
can stimulate ovulation by improving insulin action. But if the stimulation is inadequate (which will be evident by the follicular study) then, drugs that stimulate ovulation like Clomiphene are given along with HCG injection
to stimulate ovulation.
The size of the dominant follicle will determine your chances of pregnancy
. 20 mm size will indicate that it is capable of rupturing to release the egg. It is better to be under regular monitoring with your treating Dr and follow his/her instructions to improve your chances of pregnancy.
I hope this is helpful to you.