Pregnancy is a physiological process that a woman needs to go through in her life, and choosing the right time to get pregnant is one of the prerequisites to ensure the quality of pregnancy. The appropriate time of pregnancy is chosen or considered based on several criteria: first, the age factor. Women are currently considered to be older after the age of 35. The chances of obstetric complications increase significantly in older women. The chance of adverse pregnancy is also correspondingly higher. Therefore, it is recommended that childbirth be carried out before the age of 35 if possible. Second, the physical state of the pregnant woman. Before pregnancy, a woman undergoes a series of laboratory tests. This is currently screening the patient for some underlying disease that could affect the pregnancy process. If the test results are not significantly abnormal, then normal preparation for pregnancy can proceed. If the test results are abnormal, then the primary disease needs to be treated first. Thereafter, a suitable time for pregnancy will be chosen. Third, the timing of ovulation. The chances of conception increase when women have intercourse during ovulation, so it is recommended that couples preparing for pregnancy have sex during ovulation, which can greatly increase the chances of conception. To sum up, it is recommended that women choose to conceive at the best time of ovulation before the age of 35, without any obvious underlying diseases, and with adequate preparation for pregnancy.