<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello doctor i m srilu 28 years old ..my problem z i m not conceiving trying from one and half year...my thyroid, prolactin, fsh and lh levels are normal...i had a miscarriage in 2012 june and had a D and C at that time..i do not know what is my problem...pls answer my query  <response>: Hi Still, Thanks for the query. I understand hour concern. Please know few facts about conception. -Two plain needs for conception are. Ovulating menstrual cycles healthy sperms with optimum counts. -patent fallopian tubes... Need patency test if needed. -By ovulation, a mature ovum is expelled out through ovary. This ovum can get fertilized within 36 hours from ovulation. -Sperms deposited In female vagina during intercourse. Are viable for 3 days In these days they have to reach OSU lying in fallopian tube unite with it fertilization -fetus needs optimal hormonal support for survival sometimes hormone supplements are needed. -home pregnancy test is reliably ve after 8 days delay in periods. - Its safe to be under expert care throughout the pregnancy. I feel this will help you. Wish you all the best! Thanks. 