The reproductive process is described in stages
Generally speaking, the process of creating subsequent life is described in stages, including conception, embryo and placenta development, pregnancy and delivery.
Sexually transmitted diseases and prevention
It usually includes sexually transmitted diseases (STDs) and prevention, as well as contraception.
Sexual physiology and psychological knowledge of teenagers
Sexual physiology and psychological knowledge education for teenagers. The main contents are: anatomical knowledge of male and female reproductive organs; Physical changes during development; The process of fertility; Sexual moral education; Family planning, eugenics knowledge, etc.