Women, do you know your uterus?

　　Why is the cervix an accident-prone area?

　　The cervix is Uterus The passage connecting it to the vagina is also an accident-prone area. female The vagina is connected to the outside world, and there are many chances of being infected by bacteria in life, such as various microorganisms brought by it during sex, the invasion of bacteria after the cervix is ​​damaged after abortion, or bacteria infected by bad lifestyle. However, these pathogenic bacteria only reach the cervix and rarely invade the uterus. Because the cervical mucosa secretes mucus, a mucus plug forms in the cervical canal, which isolates the uterus from bacteria.

　　According to research, bacteria can be detected in the lower 1/3 of the cervical mucus plug, but no bacteria are found in the upper 2/3. In this way, the cervix becomes an important gateway to resist external bacteria, which means it will be stimulated by more pathogens.

　　Menstruation comes from the lining of the uterus

　　The surface layer of the uterine wall is the endometrium, where menstruation occurs. After the menstrual period, under the action of estrogen secreted by the ovaries, endometrial cells begin to grow. On the 5th to 9th day, a thin layer of endometrium covers the entire uterine surface, and then gradually thickens, and the number of uterine glands gradually increases. On the 15th day, the ovary has ovulated, and the endometrium continues to thicken under the stimulation of progesterone, reaching a thickness of 5 to 6 mm. On day 25, if the egg is not fertilized, estrogen and progesterone levels will drop, the glands will shrink, and the endometrium will gradually become thinner. Eventually, the endometrium loses support and peels off, manifesting itself as menstrual cramps. In the womb, a play like this is performed once a month.

　　　why Dysmenorrhea？

　　10% of women during their childbearing period will experience endometrial reflux, which travels along the fallopian tubes to the abdominal cavity, ovaries, and even the rectum, causing endometriosis. Local bleeding occurs under the control of hormones every month, leading to inflammation and edema in surrounding tissues, leading to dysmenorrhea. In addition, if the cervical canal is narrowed or the uterine position is abnormal, it will affect the discharge of menstrual blood and cause dysmenorrhea. Dysmenorrhea may also occur due to abnormal uterine contractions caused by uterine fibroids and endocrine disorders.

　　How to find your ovulation day?

　　After a woman ovulates, her body will produce a type of progesterone, which has the effect of raising body temperature to promote implantation of the fertilized egg, so we can use changes in body temperature to find the day of ovulation. The body temperature before ovulation continues to be around 36.5°C, with a fluctuation range of 0.2°C. This is the hypothermic period, also called the follicular phase. ； On the morning of the end of the hypothermia period, the body temperature will be 0.3 to 0.4°C lower than the previous day. This day is the day of ovulation. After ovulation, the body temperature rises quickly by about 0.3 to 0.5°C and enters the high temperature period, that is, the luteal phase. This high temperature will last for about 14 days. If you are not pregnant, the secretion of progesterone will decrease, the endometrium will fall off and become menstrual blood, and the body temperature will drop and the hypothermia period will begin again. This is the law of body temperature fluctuations. Basal body temperature is usually measured before getting up in the morning. It is recommended to use a specialized basal thermometer, which has a more accurate scale and clearly identifies different stages of body temperature. By correctly measuring your basal body temperature for several months, you can accurately predict your ovulation day.

　　uterus during pregnancy fetus energy

　　In a woman's lifetime, the ovaries will ovulate approximately 400 to 500 eggs. The ovulation time is generally on the 13th to 16th day of the menstrual cycle, or about the 14th day before menstruation. At this time, the chance of conception is relatively high when having sex. On day 15, the egg and sperm After meeting and fertilizing in the fallopian tube, the endometrium is soon notified, and the original plan is stopped immediately and continues to thicken on the existing 5mm thickness to make it suitable for implantation of the fertilized egg. It takes 3 to 4 days for the fertilized egg to pass through the fallopian tube and reach the uterus, choose a suitable implantation location and gradually get close to it. The implantation is completed in 11 to 12 days, and the embryo and the mother's body are integrated.

　　Why are fetuses vulnerable to harm in early pregnancy?

　　The survival of the fetus in the mother's body depends on the placenta. One side of the placenta is made of villi, which contain countless small arteries and veins, which are closely connected to the inner surface of the uterine wall. The small blood vessels converge on the main trunk, and on the other side they become the veins and arteries of the umbilical cord, which connect the fetus. It replaces the functions of the fetus's lungs, liver, kidneys and gastrointestinal tract, bringing oxygen and nutrients from the mother's body, and then taking away carbon dioxide and metabolic waste. In the placenta, there are epithelial cells separating maternal blood and fetal blood. This is the "placental barrier", which enables the placenta to have a defensive function and prevent bacteria and other pathogens from passing through the epithelial cells.

　　However, viruses and drugs can pass through, so this defense function is very limited. Especially in the early and middle stages of pregnancy, the placental barrier is weak, and harmful substances will invade the placenta and cause abnormal fetal development. Therefore, there are four taboos in early pregnancy: avoid drug abuse, contact with harmful substances, infections, and tobacco and alcohol to prevent certain harmful substances from passing through the placental barrier and affecting fetal development.

　　Why does it appear Ectopic pregnancy？

　　After the egg is discharged, the adjacent fimbriae of the fallopian tube picks the egg up like an egg, and then, with the help of the peristalsis of the tube wall and the activity of the endometrial cilia, it travels inside the fallopian tube toward the uterus. If the sperm reaches the fallopian tube at this moment, fertilization can be completed and the fertilized egg will implant, gestate, and grow in the uterus. If inflammation or tumors (such as uterine fibroids) occur in the reproductive organs, affecting the peristalsis function of the fallopian tube, causing the fertilized egg to be blocked from running and implanting in the fallopian tube, ectopic pregnancy will occur. 90% of ectopic pregnancies occur in the fallopian tube.