The causes of female infertility are multifaceted and can be broadly classified into three major categories: organic pathological factors, immunological factors, and endocrine factors, but sometimes these three categories or two of them may coexist. One of the causes of female infertility: premature sexual experience Two of the causes of female infertility: delayed development of secondary sexual characteristics Three of the causes of female infertility: inattention to menstrual protection Four of the causes of female infertility: endocrine problems Five of the causes of female infertility: excessive thinness or obesity Those with premature sexual experience are prone to female infertility A large amount of clinical data confirms that women who have sex too early are not only prone to reproductive system infections, but also suffer from the effects of taking contraceptives (including emergency contraceptives). It is also possible to suffer from endocrine disorders caused by the use of contraceptive pills (including emergency contraceptive pills), abortion or medical abortion, which can affect ovulation. Anyone who has early sexual experience and has infertility after marriage should be systematically examined as soon as possible to avoid aggravating the condition and affecting the treatment effect. The development of secondary sex characteristics is often prone to female infertility. We should pay attention to our own development and pay enough attention to the delayed development of secondary sex characteristics and go to the hospital for examination in time. In general, women will have their first menstruation at the age of 12-14, after which their body hair will begin to grow and their breasts will gradually develop and rise. If there are other physical abnormalities, you should go to the gynecological examination in time to prevent infertility. Those who do not pay attention to the protection of menstruation are prone to female infertility and should take special care during menstruation, pay attention to proper rest, do not engage in strenuous activities, and should not eat cold food, In some cases, vaginitis, endometritis, endometritis, adnexitis, pelvic inflammatory disease, etc. may occur, and the possibility of tubal obstruction and incompetence increases. If you intend to get pregnant but cannot, you should go to the hospital for examination as soon as possible. Endocrine problems cause female infertility Menstruation is a barometer reflecting women’s raw endocrine condition. Many endocrine diseases are often manifested in menstruation, and the endocrine condition can be judged from menstrual cycle, menstrual color and menstrual volume. If you have scanty menstruation, amenorrhea, dysmenorrhea, or more than one menstrual period, you should go to the hospital promptly. Late onset of menstruation often indicates problems with the development of the reproductive system; onset and then stopping of menstruation often indicates endocrine abnormalities; if severe dysmenorrhea occurs, there may be problems with uterine development and endometriosis; if menstruation is scanty or even amenorrheic, in addition to obesity and hirsutism, it is likely to be polycystic ovary syndrome. These diseases, often, are commonly associated with female infertility. When the body is too thin or too fat, female infertility should be brought to the attention of those who cannot conceive successfully after marriage. Some young girls with late menarche, thin bodies, menstruation after the age of 16, low menstrual volume, light color and thin quality, or women who are on a diet or lose weight are prone to infertility; and when overly obese women do not get pregnant after marriage for a long time, the possibility of diseases such as obesity reproductive incompetence syndrome and polycystic ovary syndrome should be excluded.