Hormonal disorders; hormone levels that hinder the development, release, or the implantation of fertilization eggs into the uterus Congenital abnormalities or tumors of the uterus Problems with excess body weight can cause infertility by preventing ovulation or creating problems. Immunological causes; low quantities or low quality of cervical secretions (cervical mucus) Endometriosis Adhesions in uterus or clogged or damaged tubes due to surgical interventions or infections, Pelvic (lower abdomen) infections Endocrine diseases like the diseases of the thyroid gland Genetic diseases Substance dependence Psychological causes