Why haven’t I gotten pregnant even though ejaculation occurred inside?

There are many potential reasons why conception may not occur even when unprotected intercourse with ejaculation inside the vagina (often referred to colloquially as “it went in”) has taken place. Pregnancy requires a precise sequence of physiological events: ovulation must occur, a viable sperm must successfully fertilize a mature oocyte, and the resulting embryo must implant in a receptive endometrium. Disruption at any step can prevent pregnancy.

Common contributing factors include ovulatory disorders—such as polycystic ovary syndrome (PCOS), hypothalamic amenorrhea, or premature ovarian insufficiency—which impair regular egg release. Tubal factors, including prior pelvic inflammatory disease, endometriosis, or previous surgery, may cause tubal obstruction or dysfunction, preventing sperm–egg interaction. Male factor infertility—including low sperm concentration, poor motility, abnormal morphology, or functional sperm defects—affects fertilization capacity in up to 40–50% of couples experiencing infertility.

Additional considerations include uterine abnormalities (e.g., submucosal fibroids, intrauterine adhesions, or congenital anomalies), luteal phase defects affecting endometrial receptivity, immunologic factors, unexplained infertility (diagnosed after standard evaluation reveals no identifiable cause), and age-related declines in oocyte quality and quantity—particularly notable after age 35. Lifestyle factors such as smoking, excessive alcohol intake, obesity or underweight status, chronic stress, and certain medications may also influence fertility.

Couples under 35 who have been attempting conception for ≥12 months without success—or those 35 and older trying for ≥6 months—should seek evaluation by a reproductive specialist. A comprehensive assessment typically includes semen analysis, assessment of ovarian reserve (e.g., AMH, FSH, antral follicle count), confirmation of ovulation (via serum progesterone or urinary LH testing), and evaluation of tubal patency (e.g., hysterosalpingography). Early, evidence-based intervention improves outcomes and helps guide appropriate management—whether lifestyle optimization, ovulation induction, intrauterine insemination, or assisted reproductive technologies like IVF.