An implantable, non-hormonal male contraceptive has been shown in trials to last for at least two years. The contraceptive, ...

Vasectomy is a minor surgical procedure that is a form of birth control that stops sperm from leaving the body.

This procedure involves connecting the vas deferens directly to the epididymis, a duct that transmits sperm from the testis to the vas. As with microsurgical vasovasostomy, this procedure can be ...

These are the primitive sex cells that will form eggs and sperm. If bird becomes male, Wolffian ducts develop into vas deferens or sperm duct and Mullerian ducts atrophy. The reverse occurs in the ...

These are the primitive sex cells that will form eggs and sperm. If bird becomes male, Wolffian ducts develop into vas deferens or sperm duct and Mullerian ducts atrophy. The reverse occurs in the ...