Premature ejaculation does not affect fertility. Whether a man is fertile or not mainly depends on whether the quality of sperm is normal. If the sperm quality of normal men is within the standard range, they can be fertile even if they suffer from premature ejaculation, as long as they have internal ejaculation. However, if the patient has premature ejaculation and low sperm quality, such as low sperm vitality and concentration, it can also affect conception. In some cases, premature ejaculation is so severe that the patient often ejaculates without entering the body, so even if the male has normal sperm quality, the chance of conception is very low because the patient does not have internal ejaculation.