Age is the major factor of female fertility. Increasing age reduces the number and quality of eggs. The first signs of declining fertility appear around the age of 35, and after the age of 40 the fertility decreases dramatically.
Anovulation – failure of maturation and release of eggs – is one of the most common causes of female infertility. It is caused by a hormonal disorder of interaction between single glands and control centers.
Inflammation of the fallopian tube function can be considered to be a further cause. In this case, the transport function of fallopian tubes is damaged – the oviduct is not able to capture the egg after ovulation and, after its fertilization, transport the embryo into the uterus.
Pelvic surgery may be a risk for women because they tend to cause adhesions.
Endometriosis is a condition in which the tissue normally lining the womb (or uterus) grows on different organs outside the uterus, forming cysts. They are often found on the pelvis and ovaries causing fertility problems.
Sperm motility, fertilization and the implantation of embryos may be negatively affected by local or general antibodies produced by the woman’s body.