Norplant’ is the new form of birth control and it
Allows ovulation but doesn’t allow fertilization
Makes the cervical mucus thin making sperm entry into the uterus difficult
Has progestin as the active ingredient
Is effective for a maximum of one year
What is the function of copper $-T$ ?
The animal population becomes too large for its feeding source or its habitat, its members starve die but humans escape this disaster by
July $11$ is observed as
In the population of world, how many persons are added per year
Scientificstudy of human population is called