40 best dating tips for men over 40

Too little sperm in an ejaculation might make it more difficult to get pregnant because there are fewer candidates available to fertilize the egg. Fertility is most likely if the semen discharged in a single ejaculation (ejaculate) contains at least 15 million sperm per milliliter.

Sperm health depends on various factors, including quantity, movement and structure: The penis ejaculates semen during sexual intercourse. Fluid from the seminal vesicles and prostate gland combine with sperm to make semen.

The male reproductive system makes, stores and moves sperm.