The examination time for infertility is determined by the age of the patient and the examination items, which are divided into the following aspects: 1. Women over 35 years old who have not been pregnant for six months should be examined promptly; 2. Women over 40 years old who have not been pregnant for three months should be examined promptly; 3. Infertility patients with relatively regular menstruation should start follicle monitoring 15-16 days before the next menstrual period; 4. Infertility patients with irregular menstruation should undergo endocrine examination 2-4 days after their menstrual period; 5. Imaging or tubal lavage examination should be performed 3-7 days after menstruation is clean; 6. Male infertility patients should visit the clinic for examination 3-7 days after sperm discharge.