Intramuscular contraceptive injections represent a preferred alternative for many women wishing to avoid an unintended pregnancy. This guide details the essential elements to know about this hormonal method, including how it works, its advantages and disadvantages, as well as the conditions to be met for its optimal use. With proven effectiveness and unique features, this form of contraception deserves to be explored in depth to make the most informed choice possible.
What is an intramuscular contraceptive injection?
This method of contraception consists of an injection of a synthetic progestin, often referred to as Depo-Provera®. Administered by a healthcare professional, it is performed every three months and requires a medical prescription. With a duration of action of 12 weeks, this method offers a form of fertility control appreciated by some women.
How do contraceptive injections work?
Intramuscular contraceptive injections primarily work by blocking ovulation, thickening cervical mucus, and inhibiting the implantation of an embryo. The main component of these injections is medroxyprogesterone acetate, a progestin that, unlike the combined pill, does not contain estrogens, making it a choice for those who cannot tolerate them.
Who are contraceptive injections for?

Eligibility Criteria
This method mainly targets women who cannot use other forms of contraception, such as the pill or the IUD. However, contraindications exist, including obesity, diabetes, and certain conditions like hypertension or a history of cancer. To determine if this contraceptive is suitable, a medical consultation is essential.
How are contraceptive injections administered?
Injections must be administered every three months, often at the beginning of the menstrual cycle to maximize their effectiveness. If the injection is given in the first few days of the cycle, contraceptive protection sets in within 24 hours. Otherwise, an additional wait time is recommended before engaging in sexual intercourse.
The advantages of contraceptive injections
Intramuscular contraceptive injections have several benefits. Among them, ease of use, as only one injection every three months is needed. Additionally, they provide effective protection, with a success rate of 99.8% when administered correctly. Some women also report a decrease in menstrual pain and a reduction in the heaviness of their periods.
The disadvantages to consider

The side effects of contraceptive injections can vary from woman to woman. Some may experience weight gain, mood swings, or headaches. These effects should be taken seriously, as once the injection is given, adverse effects may persist until the end of the protection period.
Cost and reimbursement of contraceptive injections
The cost of an injection is approximately 3.50 €, an amount that can be reimbursed up to 65% by health insurance. This detail can play a role in the final choice of contraceptive method, making access more affordable for women who use it regularly.
Encountering intramuscular contraceptive injections offers a broad gateway to a more proactive management of fertility. Each woman is unique, with different needs and preferences. Whether for medical reasons or personal choice, contraceptive options are now more accessible, allowing each woman to find the solution that best suits her. Once I had the chance to talk with a patient who explained that this method had freed her from a constant anxiety related to her periods, giving her great peace of mind. Over time, she was able to focus on other aspects of her life while enjoying worry-free moments. It is always inspiring to see how different methods of contraception can positively transform the lives of many women, helping them regain control over their bodies and their futures.