Hi SP, Let me explain the cycle for you to understand use of the medicine. For a lady with cycle of 28 days, around 6-7 follicles ( eggs within them) are put forward. Out of these only 1 will rupture in normal cycle, multiple if stimulated with hormone injections. Around 13-14th day of periods(around 18-24mm size), the follicle will be right size to rupture & push the egg out, it stays alive for 24 hrs. This is the time you should have intercourse & sperm meets egg. It forms the baby/ embryo. Once follicle ruptures, remains of the follicle will produce progesrone hormone which will act on inner lining of uterus & make it right thickness for baby to sit, further it will maintain the embryo in uterus & prevent early pregnancy bleeding/ abortion. This support is required till 12 weeks of pregnancy ,when the placenta appears. SUSTEN is this hormone progestrone. Especially in PCOD these hormones are not well formed naturally, so supplementation is required. I don t see any use of that follicle of 34 mm. Once more than normal range, they are not healthy. Only when right sperm , meets the right egg , at right time , at right place ,in right hormonal status of body & reaches right thickness of uterine lining will healthy baby occur. Every attempt will not lead to pregnancy. You have to patiently try for the right opportunity. You will surely get it , as luckily you are ovulating in spite of PCO. You have a good chance of pregnancy Hope I have clarified your query All the best Dr.Balakrishnan