In order to prevent infertility, first we need to know what are the causes of female infertility. For young women, the main factors that may occur are obstruction or adhesion of the fallopian tubes, pelvic inflammatory disease, endometrial pathology, ovarian ovulation dysfunction and so on. In order to avoid or minimize the occurrence of the above situations, young women can take the following precautions: 1. Refuse unprotected sex, that is to say, know how to contracept. Having an abortion or drug abortion after an unwanted pregnancy may lead to infertility, mainly because of the adverse effects on the fallopian tubes and the endometrium. Many women who have had a history of abortion will have varying degrees of adhesions or obstruction of the fallopian tubes when they have a tubalogram. The fallopian tubes are adjacent to the uterus, and a small amount of blood may reflux into the fallopian tubes or even the pelvis during an abortion, leading to an inflammatory response and the formation of adhesions or obstruction. There are also very few women who have thin endometrium or uterine adhesions after abortion or medication abortion, which cannot be restored to normal thickness through treatment. This may be due to the damage to the basal layer of the endometrium during scraping, and the endometrium can no longer grow, just like the barren land, which can’t allow the seeds to take root and germinate. Problems with the fallopian tubes can be solved by laparoscopic surgery or IVF treatment, which is more time-consuming and labor-intensive; however, problems with the endometrium have never been fully conquered, and there is no effective treatment yet. Therefore, young women must protect themselves well and take good contraceptive measures. 2. Pay attention to hygiene to avoid pelvic inflammatory disease. Acute pelvic inflammatory disease is most likely to occur in sexually active women. Pelvic inflammatory disease has a greater impact on the fallopian tubes. When acute pelvic inflammatory disease is not adequately treated and develops into chronic pelvic inflammatory disease, pelvic adhesion will be very serious, and tubal adhesion will also be very serious, thus affecting the function of tubal transportation leading to infertility. In this case, surgical treatment is ineffective, pelvic adhesions are difficult to be loosened, and the possibility of re-adhesion after surgery is high. In addition, a history of appendicitis, tuberculosis, or a history of pelvic-abdominal surgery may also lead to inflammation of the pelvis, which can affect fertility. Those with the above history of infertility should consider that this may be a tubal factor of infertility. 3.If you have polycystic ovary syndrome (PCOS), it is important to see a doctor in time. PCOS is a common gynecological endocrine diseases, no reproductive requirements of young women tend to ignore this disease, wait until the reproductive requirements of the child can not conceive a child to seek medical treatment. It is characterized by menstrual disorders, acne, obesity and infertility. Obesity and endometrial hyperplasia are likely to occur during the period when PCOS is neglected. Obesity is less likely to be followed by weight loss, and obesity may exacerbate metabolic problems, which in turn affects fertility. Endometrial hyperplasia, on the other hand, is due to irregular ovulation, and the endometrium proliferates under the action of estrogen without the conversion of progesterone, and over time, hyperplasia, or even precancerous lesions, develop. Therefore, when irregular menstruation occurs for several months, it is recommended to seek timely diagnosis and treatment. Young women should also establish a healthy lifestyle, including regular work and rest, adequate sleep, a balanced diet with less sugar and oil, and proper exercise. It is also important to get married and have children before the age of 35, rather than waiting until they are older and have declining or low ovarian function before turning back to spend more time and energy on fertility issues.