<unk> —also known as semenarche—is the beginning of development of sperm in boys' testicles at puberty. It is the counterpart of menarche in girls. Depending on their upbringing, cultural differences, and prior sexual knowledge, boys may have different reactions to<unk> , ranging from fear to excitement.<unk>  is one of the first events in the life of a male leading to sexual maturity. It occurs at the time when the secondary sex characteristics are just beginning to develop. The age when<unk>  occurs is not easy to determine. However, researchers have tried to determine the age in various populations by taking urine samples of boys and determining the presence of spermatozoa. The presence of sperm in urine is referred to as spermaturia.
Spermarche
Menarche
Gonadarche
Pubarche
Thelarche
Adrenarche
Sunovion
Menstrual pad