Hi Thanks for the query to Health Care Magic . As you stated that there was ovulation till August but after that no ovulation. All of sudden missing of ovulation may be due to these possibilities , these include: 1 Tube blocking i.e. fallopian tube may be blocked due to unknown reason . Diagnosis can be confirmed by ultrasound of both tubes with M R I . 2 Hormonal changes , although you stated that hormones are normal but proper liberation at proper time is necessary for successful ovulation. 3 Immature size of follicles i.e. size of follicle should be around mm to 20 mm on day 14-15 at least to rupture and ENDOMETRIUM thickness must be around 11 mm to conceive. 4 Tipped uterus i.e. If uterus is tipped or retroverted woman amy have pain during intercourse and difficulty in conception. Diagnosis can be confirmed by ultrasound of uterus . In my opinion clomiphene ( siphene )only help in stimulation of follicle size and help in ovulation . Sometimes gynecologist also advise there patient injection MENOGEN for infertility purposes , so consult an infertility specialist and get his opinion as mentioned above. Hope this information will be useful for you . Further , if any question I will reply. Good luck.