Two consecutive days of coitus will generally not affect the quality of sperm. It takes about 74 days for spermatogonia to develop into mature spermatozoa. Sperm formed on two consecutive days basically belong to the same batch, and there is no difference in the environment of production and development, so there is basically no difference in the quality of the spermatozoa, only that the number of spermatozoa on the second day may be less than that on the previous day, but it will not affect the quality of spermatozoa. The quality of sperm is mainly affected by testicular and epididymal function, genetic inheritance, living habits, mental stress, physical illness and other factors, and the number of coitus is not directly related. However, men and women should not have intercourse too often, otherwise the sperm count will be affected, which in turn will affect the chances of conception. If there is a need to prepare for pregnancy, it is recommended that men go to a regular hospital, under the guidance of a doctor to do sperm tests, if there is any abnormality, it should be treated in a timely manner in accordance with the doctor’s instructions, so as not to affect the preparation for pregnancy.