Will the Pill Pack on Pounds?
Other hormonal forms of birth control, including the patch and ring, shouldn't cause weight gain, either. The age at which you start taking the pill can be a factor - many women begin taking the pill as teenagers and through their 20s, when women naturally tend to gain weight.
It's always a smart idea to consult your doctor with any concerns you have about taking prescribed medication, but you can cross weight gain off the list of worries about oral contraceptives.