Menstruation is like our old friend, visiting once a month for about 7 days each time. We are already familiar with its existence. Once there is a problem with our uterus, menstruation will also be affected, and the thickness of the endometrium is related to the length of menstruation. Next, let's take a look at the thickness of the endometrium before menstruation.
The 15th to 28th day of the menstrual cycle, approximately half a month before the onset of menstruation, is the secretory phase of the endometrium, corresponding to the luteal phase of the ovarian cycle. At this time, the progesterone and estrogen secreted by the corpus luteum continuously thicken the endometrium, which is thick and soft, rich in nutrients, and conducive to the implantation and development of fertilized eggs. The secretory phase of the endometrium can be divided into three stages:
1. Early secretion: the 15th to 19th day of the menstrual cycle. During this period, the endometrium continued to thicken, exceeding 5mm; The endometrial glands become longer and show a clearly curved state; Endometrial interstitial edema, spiral arterioles continue to proliferate and bend.
2. Mid secretion period: the 20th to 23rd day of the menstrual cycle. The endometrium has become thicker and serrated compared to before. At this point, many important immunoglobulins in the blood bind with binding proteins secreted by epithelial cells and enter the uterine cavity. The stroma of the endometrium becomes more loose and swollen, and spiral small arteries further proliferate and curl.
3. Late stage of secretion: the 24th to 28th day of the menstrual cycle. Now it is the premenstrual period, and the endometrium is sponge like with a thickness of 10mm; The stroma of the endometrium is looser and in a edematous state.
The above is the encyclopedia introduction about the thickness of the endometrium before menstruation. In short, the thickness of the endometrium can vary, which is a normal phenomenon, so there is no need to worry too much. Additionally, during the premenstrual period, many women may experience feelings of restlessness and irritability, and it is important to learn how to regulate them.
