Many patients with adenomyosis are very concerned about the thickness of the endometrium because, as you know, adenomyosis is the invasion of the endometrial glands and mesenchyme into the myometrium to form diffuse or restricted lesions, and the endometrium and adenomyosis can be closely related. A description of the thickness of the endometrium can always be found in the examination reports of the uterine adnexa. Is it better to have a thicker or thinner endometrium? In fact, the thickness of the endometrium varies at different times of a woman’s menstrual cycle, mainly due to the influence of hormonal secretion at different times. Taking the 28th day of the normal menstrual cycle as an example, the normal thickness of the endometrium generally varies from 5-10mm and is divided into three periods: the proliferative period, the secretory period and the menstrual period. 1. Proliferative phase: the 5th-14th day of menstrual cycle. The thickness of endometrium in this period increases from 0.5mm to 3-5mm, and the proliferative period is divided into early, middle and late proliferative period. During the early proliferative phase, i.e. days 5-7 of the menstrual cycle, the endometrium is relatively thin at 1-2 mm, and during the mid-proliferative phase, i.e. days 8-10 of the menstrual cycle, the endometrial glands increase and grow. By the time it reaches the 11th-14th day of the menstrual cycle, it has entered the late stage of proliferation and the endometrium is further thickened to 3-5mm. 2. Secretory phase: 15th-28th day of the menstrual cycle. The endometrium increases from 5mm to 10mm. this phase corresponds to the luteal phase of the ovarian cycle. The secretory phase is divided into early secretory phase, middle secretory phase and late secretory phase. The early secretory phase is the 15th-19th days of the menstrual cycle, during which the endometrial glands are longer and more distinctly curved. The mid-secretory phase is from day 20-23 of the menstrual cycle, when the endometrium is thicker and has a jagged shape. By the 24th-28th day of the menstrual cycle, this period is premenstrual and corresponds to the luteal phase degenerative stage. The endometrium during this period is spongy and up to 10mm thick. 3. Menstrual phase: 1st-4th day of the menstrual cycle. This is the period when the spongy functional layer of the endometrium disintegrates and sheds from the base, which is the final result of the withdrawal of progesterone and estrogen. The thickness of the endometrium that is conducive to conception is generally considered to be about 8 mm. The best period of endometrium for easy conception is during the luteal phase. When is the most accurate time to check the thickness of the endometrium? Generally speaking, the time to check the endometrium is usually 3 to 7 days after menstruation, as ultrasound will be able to observe the occupancy of the uterine cavity relatively clearly at this time. The time of examination is determined by the thickness of the endometrium. Since the difference between thick and thin endometrium is after ovulation, it is recommended to go for ultrasound examination of endometrial thickness around the 22nd day of the menstrual cycle. Hazards of thin endometrium: 1. Causes miscarriage. The endometrium can be said to provide fertile soil for pregnancy. If the endometrium is thin, it will lead to unstable fertilized eggs, and even if conception is successful, it will be difficult to supply enough nutrients to the embryo, leading to miscarriage after pregnancy. Just like a fertile soil will produce fruitful results, while a poor soil will not produce any grass and some will only grow some thin seedlings. 2, induce a variety of gynecological diseases. The thin endometrium will directly cause leucorrhea abnormalities, and long-term leucorrhea abnormalities will induce menstrual irregularities, which in turn will lead to various gynecological diseases. 3, leading to infertility. If the endometrium is too thin, it will make it difficult for fertilized eggs to form, and the combination of sperm and eggs will be hindered, greatly reducing the chances of women conceiving. The hazards of a thick endometrium: 1, causing endocrine disorders and premature aging of the face: the thickening of the endometrium is related to the hormone levels in the female body, the hyperplasia of the endometrium is mainly due to endocrine disorders, which can easily lead to spots and dull skin on women’s faces. 2, affect women’s pregnancy: the production of eggs in the ovarian cycle to secrete estrogen and progesterone leads to enhanced blood flow in the endometrium, resulting in thickening of the endometrium and hyperplastic endometrium, which may affect women’s pregnancy. 3, a lot of bleeding: endometrial thickening often causes irregular vaginal bleeding, and the bleeding volume increases when the condition is serious, which can easily lead to anemia symptoms. Some patients with adenomyosis are affected by estrogen and tend to have thickened endometrium to the point of large menstrual volume, drenching bleeding, anemia and other symptoms. Therefore, too thin or too thick endometrium is not good for health. If patients have related symptoms, they need to be treated and regulated in time. In addition, maintaining a good mood is very helpful to maintain the normal changes of the endometrium.