The contraceptive injection (Depo-Provera, Sayana Press or Noristerat) releases the hormone progestogen into your bloodstream to prevent pregnancy.
The contraceptive injection (Depo-Provera, Sayana Press or Noristerat) releases the hormone progestogen into your bloodstream to prevent pregnancy.  Depo-Provera is most commonly given in the UK and lasts for 13 weeks.