Although 80% couples conceive within first year of marriage, 20% need evaluation and treatment.
Normally pregnancy occurs when intercourse takes place around ovulation; in a clean (non infected or diseased) pelvis, provided sperm count and motility is good. Ovulation occurs 14 days before expected menses that is on 16th day in a 30th day cycle or on 10th day in a 24th day cycle. Women with clean and healthy reproductive tract usually do not experience pelvic pain, unhealthy discharge, pain during intercourse or severe dysmenorrhea.
Sperm count should be more than 20 million, with at least 40% Grade-IV motile sperms and at least 4% normal forms. If you are trying to conceive and heavy irregular menses think of ovulatory problem, if you have pelvic pain dysparunia it’s probably a pelvic peritoneal and tubal factor.