Progestogen-only injectable contraception is a hormonal type of contraception that is given through an injection. It contains a synthetic form of the hormone progesterone, known as progestin or progestogen. They provide protection against pregnancy for up to 8 to 14 weeks.
Types
- Medroxyprogesterone acetate (DMPA)
- Norethisterone enanthate (NET-EN)
Mechanism of action
- This hormone works primarily by suppressing ovulation (preventing the release of an egg from the ovaries).
- It also thickens cervical mucus, making it more difficult for sperm to reach and fertilize an egg.
- It can thin out the uterine lining, making it less suitable for the development of the fertilized egg.
This type of pill does not contain oestrogen and the dose of progestogen is significantly lower than in those used in combined oral contraceptive pills (COC). It is also called the “mini-pill” and is useful for women who do not want pills that contain oestrogen or in situations where the oestrogen is not suitable for medical reasons. They are a highly effective method of birth control when taken correctly.







