You can do routine gynecological examination, tubal examination, sex hormone examination or thyroid function examination, etc., as follows: 1. Routine gynecological examination: routine gynecological examination includes examination of vulva, vagina, cervix, uterus or adnexa, etc., to see whether gynecological pathology caused by the failure to conceive. 2. Tubal examination: Tubal examination generally includes tubal lysis, or hysteroscopic tubal lysis, etc., which can detect whether there are obstacles in the fallopian tubes caused by the failure to conceive. 3. Sex hormone test: Sex hormone test includes estradiol, follicle stimulating hormone, luteinizing hormone, prolactin or progesterone, etc., which can detect whether there is any abnormality in sex hormones that may cause failure to conceive. 4. Thyroid function test: thyroid function test includes thyroid function triple test, thyroid ultrasound or thyroid fine needle aspiration biopsy, etc., which can detect whether the preparation for pregnancy can’t be conceived due to thyroid abnormality. During the preparation for pregnancy, you should maintain good habits, reasonable diet, and avoid excessive stress.