Contraception mechanism of action Flashcards
Combined oral contraceptive pill
Inhibits ovulation
Progesterone only pill (excluding desogestrel)
Thickens cervical mucus
Desogestrel-only mechanism of action
Primary: inhibits ovulation
Also: thickens cervical mucus
Injectable contraceptive (medroxyprogesterone acetate/depot)
Primary: Inhibits ovulation
Secondary: thickens cervical mucus
Implant mechanism of action (etonogestrel)
Primary: inhibits ovulation
Also: thickens cervical mucus
IUD mechanism of action
Decreases sperm motility and survival
Intrauterine system (levonorgestrel) mechanism of action
Primary: prevents endometrial proliferation
Also: thickens cervical mucus
EC: Levonorgestrel mechanism of action
Inhibits ovulation
EC: Ulipristal mechanism of action
Inhibits ovulation
Intrauterine contraceptive device mechanism of action
Primary: toxic to sperm and ovum
Also: inhibits implantation