Contraception_Mode_of_Action_Flashcards
What is the mode of action of the combined oral contraceptive pill?
The combined oral contraceptive pill inhibits ovulation.
What is the mode of action of the progestogen-only pill (excluding desogestrel)?
The progestogen-only pill (excluding desogestrel) thickens cervical mucus.
What are the modes of action of the desogestrel-only pill?
The desogestrel-only pill primarily inhibits ovulation and also thickens cervical mucus.
What are the modes of action of the injectable contraceptive (medroxyprogesterone acetate)?
The injectable contraceptive (medroxyprogesterone acetate) primarily inhibits ovulation and also thickens cervical mucus.
What are the modes of action of the implantable contraceptive (etonogestrel)?
The implantable contraceptive (etonogestrel) primarily inhibits ovulation and also thickens cervical mucus.
What is the mode of action of the intrauterine contraceptive device?
The intrauterine contraceptive device decreases sperm motility and survival.
What are the modes of action of the intrauterine system (levonorgestrel)?
The intrauterine system (levonorgestrel) primarily prevents endometrial proliferation and also thickens cervical mucus.
What is the mode of action of levonorgestrel as an emergency contraceptive?
Levonorgestrel as an emergency contraceptive inhibits ovulation.
What is the mode of action of ulipristal as an emergency contraceptive?
Ulipristal as an emergency contraceptive inhibits ovulation.
What are the modes of action of the intrauterine contraceptive device as an emergency contraceptive?
The intrauterine contraceptive device as an emergency contraceptive is primarily toxic to sperm and ovum and also inhibits implantation.
Summarise contraception: mode of action
Theme: Contraception: mode of action
A. Decreases tubal motility
B. Inhibits ovulation
C. Thickens cervical mucus only
D. Toxic to corpus luteum
E. Prevents endometrial proliferation
F. Decreases sperm motility and survival
G. Induces DNA changes in sperm
H. Inhibits implantation of the conceptus
For each one of the following contraceptives please select the answer which best describes the primary mode of action.
- Combined oral contraceptive pill
- Implantable contraceptive (etonogestrel)
- Copper intrauterine contraceptive device (used as a standard contraceptive)
Theme: Contraception: mode of action
A. Decreases tubal motility
B. Inhibits ovulation
C. Thickens cervical mucus only
D. Toxic to corpus luteum
E. Prevents endometrial proliferation
F. Decreases sperm motility and survival
G. Induces DNA changes in sperm
H. Inhibits implantation of the conceptus
For each one of the following contraceptives please select the answer which best describes the primary mode of action.
- Combined oral contraceptive pill
The correct answer is: Inhibits ovulation
The questions asks for the primary mode of action.
The Faculty for Sexual and Reproductive Health (FSRH) state Combined Hormonal Contraception (CHC) works primarily by inhibiting ovulation via action on the hypothalamo-pituitary-ovarian axis to reduce luteinising hormone and follicle-stimulating hormone. Alterations to cervical mucus and the endometrium may also contribute to the efficacy of CHC.
- Implantable contraceptive (etonogestrel)
The correct answer is: Inhibits ovulation
The Faculty for Sexual and Reproductive Health (FSRH) state The progestogen-only implant is a long-acting reversible method of contraception (LARC). The primary mode of action is to prevent ovulation. Implants also prevent sperm penetration by altering the cervical mucus and possibly prevent implantation by thinning the endometrium.
- Copper intrauterine contraceptive device (used as a standard contraceptive)
The correct answer is: Decreases sperm motility and survival
