Damage to fallopian tubes (tubal infertility)
กุมภาพันธ์ 12, 2021 0 Comments
Damaged or blocked fallopian tubes keep sperm from getting to the egg or block the passage of the fertilized egg into the uterus. Causes of fallopian tube damage or blockage can include:
Pelvic inflammatory disease, an infection of the uterus and fallopian tubes due to chlamydia, gonorrhea or other sexually transmitted infections
Previous surgery in the abdomen or pelvis, including surgery for ectopic pregnancy, in which a fertilized egg implants and develops in a fallopian tube instead of the uterus
Pelvic tuberculosis, a major cause of tubal infertility worldwide, although uncommon in the United States
Endometriosis occurs when tissue that normally grows in the uterus implants and grows in other locations. This extra tissue growth — and the surgical removal of it — can cause scarring, which may block fallopian tubes and keep an egg and sperm from uniting.
Endometriosis can also affect the lining of the uterus, disrupting implantation of the fertilized egg. The condition also seems to affect fertility in less-direct ways, such as damage to the sperm or egg.
Uterine or cervical causes
Several uterine or cervical causes can impact fertility by interfering with implantation or increasing the likelihood of a miscarriage:
Benign polyps or tumors (fibroids or myomas) are common in the uterus. Some can block fallopian tubes or interfere with implantation, affecting fertility. However, many women who have fibroids or polyps do become pregnant.
Endometriosis scarring or inflammation within the uterus can disrupt implantation.
Uterine abnormalities present from birth, such as an abnormally shaped uterus, can cause problems becoming or remaining pregnant.
Cervical stenosis, a narrowing of the cervix, can be caused by an inherited malformation or damage to the cervix.
Sometimes the cervix can’t produce the best type of mucus to allow the sperm to travel through the cervix into the uterus.