Hormonal or ovulatory irregularity may lead to an obstruction during passage of the egg; The obstruction in turn may be a cause of infertility. If there is hereditary deformity or tissue adhesion from previous infection in the oviduct, it is very likely that the sperm, the egg, and the tube that transports it may become underdeveloped, twisted, or blocked, resulting in infertility. Inflammation or infection in the pelvic organs; cervix, uterus, fallopian tubes and ovaries due to S.T.D.s such as " chlamydia" that goes untreated can spread without symptoms to other parts of the body, infecting abdominal cavity, kidneys, liver, lungs and so on, often damaging reproductive functions. Gynecological problems such as menstrual cramp and hormonal imbalance can cause infertility. Obesity, smoking and other stresses on the body may also cause infertility. Furthermore, the role that our immune system plays in infertility has received increasing attention in the medical field. Even when no abnormality is detected through laboratory testing (fallopian tube free flowing and unobstructed, uterus size normal), infertility occurs when the woman's immune system makes antibodies that induce agglutination or immobilization of sperms of her partner once they come in contact with her vagina. Or, the cervical secretion and the sperms are incompatible, causing infertility.

Source of infertility is very complex.
Foremost, one must use modern medical testing techniques to diagnose the disorder and examine both male and female systems. Usually the male/female factor is first eliminated. When normal male sexual function is verified, attention is then turned to the woman. With careful planning and methodical testing, understanding of her egg passage function and the fluency of the fallopian tube is reached. Then one proceeds by examining her immunogenic function. The scenario is working up step-by-step from simple to more complex. Identifying the source, recognizing the cause, and reasonably determining proper treatment are the key to successfully treating and curing of infertility.