In practice, Yes. Many women experience weight gain as a side-effect of taking the birth control pill.
The average weight gain is 4 pounds – generally in the first three months.
Progestogen is thought to be the link between the pill and weight gain, and much depends on how the individual reacts to it.
But any weight gain caused by the contraceptive pill is generally fairly modest and unlikely to be greater than 4-6 pounds.