Becoming daddy for first time leads to lesser sex subsequently

Researchers have now found proof that men have less sex after they become a father for the first time.

High testosterone levels up mortality risk in older men

A new study has found that older men whose testosterone levels were neither low nor high tended to live longer.

`Female` X chromosome key contributor to sperm production

Scientists have found that large portions of the X chromosome -long perceived as the "female" counterpart to the male-associated Y chromosome - have evolved to play a specialized role in production of sperm.

Gel combo shows promise as male contraceptive

A hormonal gel combo applied daily to skin showed promise as a male contraceptive by reducing sperm production.

Soy beans negatively affect sperm production

Scientists in China have found that a naturally-occurring ingredient of soy beans.

Soy beans negatively affect sperm production

Scientists in China have found that a naturally-occurring ingredient of soy beans.