Progestasert is an $\mathrm{IUD}$ which makes the uterus unsuitable and cervix hostile to the sperms as they are :

Assertion : Test tube baby has raised several legal problems.

Reason : It involves in vitro fertilization followed by embryo transfer.

Assertion: The natality rate increases the population size and population density both.

Reason: The Natality increases the number of individuals in an area by births.

Assertion : Use of condom is a safeguard against $\mathrm{AIDS}$ and sexual diseases besides checking pregnancy.

Reason : Certain contraceptives are planted under the skin of the upper arm to prevent pregnancy.