Diaphragms are dome-shaped devices. They are usually made from soft rubber or silicone. They are put into the vagina and cover the cervix during sex. They stop sperm from entering the uterus (womb). There are various different types and sizes.

They are about 92-96% effective if used correctly.

Possible side effects can include:

  • Irritation
  • Urinary tract infections
  • Allergic reaction
  • Discharge