Conception is a complex physiological process and there are many causes of infertility, both male and female factors may cause infertility, the cause may lie in the female partner, the male partner, or both men and women. So, when a couple has a normal sexual life without contraception for more than a year and is still infertile, what is the most important thing to check when visiting a doctor? We know that for normal conception, a man and a woman must have normal eggs and sperm, as well as a channel for the eggs to meet the sperm, no immune problems affecting the sperm-egg union, and a normal uterine environment for the fertilized egg to implant. Therefore, the most important things that both men and women should check are the following Female infertility tests 1. Is there follicular development? Are the eggs mature? Is it possible to ovulate? Based on a woman’s menstrual cycle, the presence or absence of ovulation is presumed and the ovulation period is predicted. This can be determined by ultrasound examination of follicle development, basal body temperature measurement, cervical mucus examination or endocrine measurement. 2.Gynecological system examination An internal gynecological examination can be performed to understand the general condition of the vagina, uterus, cervix, fallopian tubes, ovaries and pelvis, and to determine whether there are any deformities or inflammation of the reproductive system. 3.Tubal patency examination Tubal lavage examination or hysterosalpingography, mainly to understand whether the fallopian tubes are patent or not, and whether the uterus and fallopian tubes are normally developed and whether there is any deformity. It is also useful for the treatment of tubal incompetence (e.g. mild adhesions). 4.Immunological examination Some infertility cases are related to the presence of immunological antibodies such as anti-sperm antibodies and endometrial antibodies in the body, so it is sometimes necessary to perform relevant immunological examinations. 5.Endometrial examination Yin ultrasound can understand the thickness of endometrial pattern and the presence of uterine fibroids, etc. Male infertility examination 1.Semen analysis: mainly semen volume, liquefaction time, PH value, sperm density, survival rate, sperm motility grading, sperm morphology, etc. 2, routine male inflammatory disease examination and microbiological examination. 3.Physical examination of male genitalia. 4.Anti-sperm membrane antibody examination. The best time for examination 1.Female endocrine examination 2-4 days after menstruation; examination of fallopian tubes 3-7 days after menstruation (no sexual intercourse); ultrasound monitoring of follicle development and observation of endometrial condition in the first half of menstruation. 2. For men, semen analysis should be done within 3-7 days after semen emission. Warm tip: It is better for the couple to visit the doctor at the same time so that the doctor can do the targeted examination and treatment according to the specific situation. Pregnancy is a systematic project, related to the male partner, the female partner and a variety of factors between the two parties, it is recommended that infertile couples go to the regular hospital specialized departments to do systematic testing and treatment, so that they can take fewer detours in order to get pregnant soon!