Every year, as millions of women marry, they dream of starting a family, of having their homes filled with tiny cries and the happy laughter of gurgling babies. In India however, pregnancy is too often followed by the question of
whether the unborn child is a girl or a boy.

A preference for sons or for more sons than daughters has been documented in several countries in the world.

Change in the size of a population takes place due to births, deaths and migration.