35-year-old Ms. Xie, after being a slave to the house, car, now finally have the financial ability to do child slaves, but not contraception for two years, but can not have children. Anxious, go to the doctor, the doctor told that the need to use assisted reproduction methods. “Nowadays, women are shifting the age of childbearing back, making the incidence of infertility increase, in fact, the earlier the child is born, the better. This is because the eggs are most fertile and most nourishing when they are at their most mature stage of development. Female fertility has a curvilinear decline with age, starting at age 30 and declining faster at age 35, and many white-collar women in companies often postpone childbirth because of work, which is actually against the natural order of things. Therefore, it is recommended that the best age for women to have children is 25-28 years old. Experts suggest that being able to have a healthy child during the fertile period without wanting to rely on assisted reproductive technology to solve the problem. 25-28 years old, the best fertility period for women Physiologically speaking, the female reproductive system mainly includes ovaries, uterus, hormone secretion, etc. After the age of 20, when the ovaries are mature, the ovaries secrete hormones and ovulate regularly, and the golden period of fertility begins. 25-28 years old is the period when the quality of eggs is relatively high and the level of hormone secretion is most stable, so it is also the best time for women to have children. Eggs cannot be regenerated and once they are depleted, the decline of ovarian function is irreversible. A woman ovulates 400-500 eggs in her lifetime, and as she ages, her ovaries undergo a series of changes: during the neonatal period, the ovaries have about 2 million follicles, and most of them degenerate during childhood, leaving only about 300,000 follicles by puberty. During a woman’s lifetime, only 400 to 500 follicles typically develop and ovulate. In adult women, the ovaries weigh about 5 to 6 g. After menopause, the ovaries shrink and become smaller. The quality of the eggs includes the ability to fertilize and split. Between the ages of 25-28, the eggs have a strong fertility and the best quality, poor fertilization ability makes it less easy to fertilize and get pregnant, poor egg splitting function decreases the quality of the fetus and makes it easy to have deformed children. The older the mother, the higher the chance of affecting the fetus than the older father, because male sperm can be replicated, while women are always in a state of depletion, so the older the woman, the older the eggs, the worse the quality of the eggs, of course, prone to fetal chromosomal abnormalities. Theoretically, the longer it takes to start having sex, the more damage it will do to the uterus, in addition to abortion, gynecological inflammation, infection, etc., will destroy the uterus, and the more the uterus is destroyed, the greater the impact on the fertilization of eggs and development, the uterus after the age of 30 compared to the uterus between the ages of 25 and 28, the level of nutrition has lagged far behind the former. Many white-collar women in companies often postpone childbirth for work reasons, which actually violates the laws of nature. Therefore, experts suggest that: the more you can give birth at the most suitable fertility period, the greater the chances of having a healthy child and the better the mother’s body recovers. The key to having a baby is progesterone. To have a baby, a woman must first protect her ovaries. The main function of the ovaries is to produce eggs and ovulate, reflecting the reproductive function; the second is to synthesize and secrete sex hormones, such as estrogen, progesterone, androgens and various growth factors. Progesterone is a hormone secreted by the normal female body, which promotes the development of the uterus and prepares it for pregnancy. Due to abnormal ovarian function, some women of childbearing age are unable to produce eggs properly, or fertilized eggs do not develop properly in the uterus. If you are unable to have children after 2 years without contraception, it is important to seek medical attention. With the rise of infertility in modern times, some women are forced to use ovulation promotion to improve their chances of pregnancy, but this practice can be very damaging to the ovaries if overdone. In general, natural cycles of ovulation promotion should be controlled for 3-6 months, and if conception still does not occur, other methods should be used instead, such as artificial insemination or IVF. In the clinic, we often encounter some infertile patients who have been repeatedly ovulating for up to 10 months or even a year, resulting in early ovarian failure, and it is too late to do IVF. At the same time, it is also important to avoid medically induced damage to ovarian function, such as ovarian cysts, especially chocolate cyst surgery, and tubal surgery, and to pay attention to protecting ovarian function. The data shows that 8-15% of married couples of childbearing age are plagued by infertility. One very important reason is the lack of progesterone, which accounts for 3.4%-35% of infertility patients, and 29%-60% of recurrent miscarriages are caused by the lack of progesterone. The endometrium is the layer where the fertilized ovum is laid, like the natural soil where the seeds germinate and grow. By repeatedly scraping the uterus, the loose soil suitable for seed growth is lost, and trying to conceive again will be like scattering seeds on a concrete floor. Normal corpus luteum function is essential for embryo implantation and maintenance of pregnancy. It encourages the development of the uterus and prepares it for pregnancy. Lack of progesterone results in insufficient endometrial thickness and nutritional support, so the fertilized egg does not attach well to the endometrium and does not receive adequate nutrition to facilitate pregnancy. Progesterone is one of the most important treatments for infertility. Progesterone supplementation can compensate for the lack of progesterone in the pregnant woman’s body, thus promoting the development of the uterine lining and making the uterus favorable for fetal growth. Progesterone also relaxes the muscles of the uterus, making it less responsive to the outside world, which facilitates the growth and development of the fertilized egg in the uterus and has the effect of preserving the fetus and settling the fetus. If ovarian function declines and diseases occur, it will lead to the following adverse consequences: irregular menstruation, ovarian atrophy, vaginal dryness, low ovulation rate, infertility, sexual life disorders and sexual frigidity; body shape will also appear fat, bloated belly, hip drop, bucket waist, etc.; skin will become dry, lack of elasticity, hair loss, luster loss; urethra atrophy, urinary excess, frequent urination, urinary incontinence, etc. In daily life, women should pay attention to less smoking and less alcohol, do not stay up late, have regular work and rest, eat more natural and nutritious food, and have a balanced diet.