Name one method of contraception which also protects against sexually transmitted diseases.

Mention two functions each of (i) human testes, and (ii) human ovaries.

What is gestation period ? How much is the gestation period in humans?

Name one sexually transmitted disease for which no definite cure has been found so far. What is the causative organism of this disease ?

What are the three types of methods used for birth control (or regulating child birth)? Give one example of each type.