Does Birth Control Cause Weight Gain?

Many people worry about gaining weight when starting birth control. It's one of the most common concerns women have about contraceptives. But what does the research actually show?

What Research Says About Birth Control and Weight

According to extensive research, most birth control methods do not cause significant weight gain. A Cochrane review of 49 studies found no strong evidence that combined hormonal contraceptives (pills, patches, and rings) lead to weight gain.

The Cleveland Clinic confirms that most birth control methods don't cause weight gain. Any small weight changes you notice in the first few weeks are usually from water retention, not actual fat gain.

The Exception: Depo-Provera Shot

The Depo-Provera birth control shot is the one method linked to weight gain. Studies show users may gain about 5 pounds during the first year. This happens because the shot delivers a large dose of progestin hormone all at once.

Methods That Don't Cause Weight Gain

Research shows these birth control options are not associated with weight gain: combination birth control pills, hormonal IUDs, contraceptive implants, the patch, and the vaginal ring. Modern pills contain much lower hormone doses than those from decades ago.

Does Birth Control Stop Your Period?

Some birth control methods can stop or lighten your period. This is safe and normal. About half of hormonal IUD users stop having periods after 6 months. Nearly 75% of people using the birth control shot have no periods after one year.

You can also skip periods with combination pills by not taking the placebo pills. According to ACOG, this is completely safe for as long as you want to do it.

Why People Think Birth Control Causes Weight Gain

Many people start birth control during times when weight naturally changes, like going to college or in their 20s. This makes it hard to tell if weight changes are from the birth control or other life factors.

Talk to Your Doctor

If you're concerned about weight changes on birth control, talk to your healthcare provider. They can help you choose the best method for your needs and monitor any changes. The good news is that most birth control options won't affect your weight.