When a man is at his peak, the number of his sperm increases significantly. Along with this, many hormonal changes also occur due to which it reaches the testicles through the blood.
Luteinizing hormone (LH) causes the Leydig cells to produce large amounts of testosterone. And follicle-stimulating hormone (FSH) acts on the spermatic cord, where sperm are produced.
Normal sperm count ranges from 15 million to 200 million sperm per millilitre of semen.
Pregnancy is possible even if sperm motility is less than 40%. But 40% is considered the limit.
Sperm typically have an oval head and a long tail, which work together to propel them forward.