In the absence of pregnancy, endometrial rejection occurs. There are certain limits for the thickness of the endometrium for each day of the menstrual cycle. If the thickness of the endometrium is less than normal, we can talk about a thin endometrium (endometrial hypotrophy), with an increase in the size of the thickness of the endometrium, we can talk about pathological thickening of the endometrium (endometrial hyperplasia). Normally, the thickness of the endometrium in the first 2 days after the end of menstruation should be no more than 3 mm, and on periovulatory days, not less than 10 mm.
Both congenital malformations of the uterus and acquired diseases of the uterine cavity are the cause of infertility.
These developmental anomalies and diseases include the following diseases:
- One-horned and two-horned uterus.
- Hypoplasia (underdevelopment) of the uterus, rudimentary uterus.
- Complete and incomplete septum of the uterus.
- Pathology of the cavity uterus (endometrial hyperplasia, endometrial polyposis, endometrial polyposis).
- Endometriosis of the uterus.
- Intramural uterine myoma with centripetal growth.
- Submucous uterine myoma.