The requirements of pregnancy on sperm mainly include the following aspects: first, the liquefaction time of semen, which requires that the liquefaction time of semen is less than 60 minutes. If it is greater than 60 minutes, it is called non-liquefaction, which has an effect on conception. Second, sperm count, including sperm concentration and total sperm count, sperm concentration is required to be greater than 15 million/mL, and total sperm count is required to be greater than 39 million/each ejaculation. If it is lower than this reference value, it is called oligospermia. Third, sperm motility, sperm forward movement in order to meet with the egg fertilization, usually requires forward movement of sperm percentage is 32%, less than 32% called weak spermatozoa. Fourth, sperm morphology, the percentage of sperm with normal morphology is more than 4%, and less than 4% is called dysmorphic spermatozoa. If the above indicators are normal, the probability of conception is higher; if these indicators are abnormal, it will reduce the probability of conception.