Hormonal Birth Control Injections: Effects on Weight, Body, and Health

Hormonal contraceptive injections (e.g., depot medroxyprogesterone acetate/DMPA) deliver progestin that prevents ovulation. They can cause various body changes:

Weight Changes

Some users gain weight (average 2–4 kg in the first year) due to increased appetite and altered fat distribution. Others experience no change or slight loss. Individual response varies widely.

Breast Changes

Tenderness, swelling, or increased size may occur initially, often subsiding after a few months.

Skin Effects

• Improvement: Reduced sebum can clear acne.
• Adverse: Dryness, sensitivity, or melasma (dark patches) in some women.

Hair Changes

Possible increased facial/body hair (hirsutism) or scalp hair thinning, related to androgenic effects of certain progestins.

Mood & Menstrual Patterns

• Mood swings, irritability, or depression reported by some users.
• Irregular bleeding/spotting is common in the first 6–12 months; periods may become lighter, heavier, or stop altogether (amenorrhea).

Fertility & Long‑Term Risks

• Fertility returns after discontinuation, but delay can be 6–18 months.
• Slightly increased risk of blood clots (VTE), stroke, and heart attack—higher in smokers, women over 35, or those with hypertension/diabetes.
• Possible decrease in bone mineral density with long‑term use; reversible after stopping.

Discuss your medical history with a healthcare provider to weigh benefits against risks. Non‑hormonal options (copper IUD, barrier methods) are available if hormonal side effects are a concern.