Three-monthly injection: Is it as safe as the pill?

With the three-month injection, the woman is injected with a hormone mix with a very high progestin content into the upper arm or buttocks every twelve weeks. The contraceptive hormones are then slowly released from this depot. But is this contraceptive method safe? We explain.

Die Dreimonatsspritze wirkt als Verhütung gut, hat aber Nebenwirkungen.© iStock
A hormone injection every twelve weeks - works well, but has side effects.

Contraception with the three-month injection

The three-month contraceptive injection is actually as safe as the pill. The progestogens inhibit ovulation and suppress the build-up of the uterine lining - an egg cannot implant and the sperm have no chance because the hormone makes the mucus in the cervix thicker - the sperm simply cannot get through.

Who is this contraceptive method suitable for?

However, this contraceptive method has side effects, which is why doctors usually only prescribe it to older women who have completed their family planning. This is because it can take over a year for the cycle to return to normal once the depot injection is stopped. This method is therefore not suitable for women who are planning a pregnancy in the foreseeable future.

Another side effect: the progestogens in the contraceptive injection massively increase the risk of osteoporosis because the oestrogen level drops significantly. However, the body needs this hormone, especially at a young age, to build up bone mass and maintain bone density.

What are the side effects of the three-month injection?

Other possible side effects include headaches, depressive moods, abdominal and back pain, skin problems, fluid retention, weight gain and liver dysfunction.

You may also be interested in this: