What is infertility? Infertility is diagnosed when a couple has normal sexual intercourse and fails to conceive for 1 year without contraception. If the couple is often separated, the time to try to conceive can be extended to 2 years as appropriate. Normal sexual life is usually 2 to 3 times per week. Since the average pregnancy rate is about 25% per month and 80% per year, couples who have been trying to conceive for less than 1 year need not be overly nervous and can just relax. Age is a determinant of fertility Infertility is, within certain limits, a disease closely related to age. As age increases, the incidence of infertility in women increases and fertility decreases. fertility begins to decline above the age of 35 and declines sharply after the age of 40. Generally speaking, 45 years old is the watershed for the availability of assisted reproductive technology to assist with pregnancy. Therefore, older women need to be more positive and rational about it. Pay attention to your period Generally speaking, normal menstruation indicates normal endocrine function and normal ovulation. The normal menstrual cycle is 25 to 35 days and the period is 3 to 7 days. If menstruation often comes once every few months or even takes progesterone drugs to come, there may be ovulation disorders; if the menstrual cycle is gradually shortened, accompanied by low menstrual flow, you may suffer from premature ovarian failure. Irregular vaginal bleeding with dripping menstruation should be ruled out, such as endometrial polyps and cervical lesions. Secondary dysmenorrhea and deep vaginal pain during intercourse should be ruled out for endometriosis. Past fertility history and surgical history Past history of abortion, medication abortion, uterine operation such as purging, IUD removal, pelvic and abdominal infections and surgical history such as pelvic abscess, appendicitis, pelvic and abdominal tuberculosis, pelvic inflammatory disease, intestinal obstruction, endometriosis, ectopic pregnancy, cesarean section, etc. may affect the function of the fallopian tubes and lead to infertility. Past medical history A history of acute and chronic pelvic inflammatory disease, tubal blockage and endometritis may be present. This affects the operation and implantation of fertilized eggs; previous endocrine diseases and autoimmune diseases, such as thyroid disease, diabetes mellitus, rheumatoid arthritis and systemic lupus erythematosus, are associated with infertility. Weight loss Weight is one of the important indicators of a person’s health status. Obesity is often associated with endocrine disorders, some of which manifest as irregular menstruation, scanty menstruation, or even amenorrhea. It is medically based on body mass index. Body mass index (BMI) = weight (kg) / height (m) squared, height refers to the net height without shoes, weight refers to the bare weight of wearing only underwear and emptying the bladder. Normal body mass index is 18 to 25, Asian women should preferably control between 20-23. For example, for a height of 1, 58 meters, weight should be about 50-57 kg. Quit smoking and drug addiction Numerous studies have shown that smoking and drugs can lead to miscarriage, premature births and low birth weight babies. In addition, studies have shown that smoking may affect fertility and male sperm count. In fact, even secondhand smoke can affect your chances of conceiving. During pregnancy preparation, you need to stay away from chemical and radioactive substances. Generally, people are afraid of talking about radiation, but in fact, a single chest, abdominal and pelvic plain film with minimal amount of radiation can be used for contraception in the same month, and in case of abdominopelvic CT, especially enhanced CT, for 2-3 months. Special reminder, if you start to prepare for pregnancy, avoid the use of nail art, hair dye and other poor quality cosmetics and perfumes.