Coil contraception refers to intrauterine devices (IUDs) or intrauterine systems (IUSs), which are
small, T-shaped, long-acting reversible contraceptives (LARCs) inserted into the uterus. They are
over 99% effective, providing, safe, long-term, and immediately reversible protection against
pregnancy for 3 to 10 years depending on the type.


There are two main types of coils:

1. Copper Coil (IUD - Non-Hormonal)
  * How it works: Releases copper, which is toxic to sperm and prevents fertilized eggs from
implanting in the womb.
  * Duration: Lasts for 5 to 10 years.
  * Best for: Those who want to avoid hormones or need emergency contraception (highly effective if
fitted within 5 days of unprotected sex).
  * Side Effects: Periods may become heavier, longer, or more painful.
  * Immediate Protection: Works as soon as it is fitted.


2. Hormonal Coil (IUS - Intrauterine System)
  * How it works: Releases the progestogen hormone, which thickens cervical mucus (blocking sperm)
and thins the womb lining.
  * Duration: Lasts for 3 to 8 years (e.g., Mirena, Kyleena, Levosert, Jaydess).
  * Best for: Those who have heavy or painful periods (it often makes periods much lighter or stops
them entirely).
  * Side Effects: Irregular bleeding/spotting for the first 3–6 months, potential acne, or breast
tenderness.
  * Protection: Effective immediately if fitted within 7 days of the start of your period.