Ovulation disorders appear to be the most common cause of infertility in women. Ovulation is the monthly release of an egg. The eggs may never be released or they may only be released in some cycles. Ovulation disorders can be due to: Premature ovarian failure: The ovaries stop working before the age of 40 years. Polycystic ovary syndrome (PCOS): The ovaries function abnormally and ovulation may notTrusted Source occur. Hyperprolactinemia: If prolactin levels are high, and the woman is not pregnant or breastfeeding, it may affect ovulation and fertility. Poor egg quality: Eggs that are damaged or develop genetic abnormalities cannot sustain a pregnancy. The older a woman is, the higher the risk. Thyroid problems: An overactive or underactive thyroid gland can lead to a hormonal imbalance. Chronic conditions: These include AIDS or cancer. Problems in the uterus or fallopian tubes can prevent the egg from traveling from the ovary to the uterus, or womb. If the egg does not travel, it can be harder to conceive naturally. Causes include: Surgery: Pelvic surgery can sometimes cause scarring or damage to the fallopian tubes. Cervical surgery can sometimes cause scarring or shortening of the cervix. The cervix is the neck of the uterus. Submucosal fibroids: Benign or non-cancerous tumors occur in the muscular wall of the uterus. They can interfere with implantation or block the fallopian tube, preventing sperm from fertilizing the egg. Large submucosal uterine fibroids may make the uterus’ cavity bigger, increasing the distance the sperm has to travel. Endometriosis: Cells that normally occur within the lining of the uterus start growing elsewhere in the body. Previous sterilization treatment: In women who have chosen to have their fallopian tubes blocked, the process can be reversed, but the chances of becoming fertile again are not high. Ashwini Hospital Moondrumavadi K.Pudur Madurai -07 , Best Fertility Care Centre , Advanced Fertility Care Centre , Maternal & amp; Child Health Care Centre , Low cost IVF & amp; ICSI C