- A Destroying oocytes within the ovarian follicle before ovulation occurs
- B Suppressing sperm motility and increasing phagocytosis of sperm
- C Stimulating excessive endometrial thickening to block the cervical canal
- D Releasing synthetic progestin hormones that suppress the LH surge
Correct answer: B. Suppressing sperm motility and increasing phagocytosis of sperm
Explanation: Copper IUDs like CuT release copper ions that suppress sperm motility and increase phagocytosis of sperm, making the uterine environment hostile to fertilisation.
Concept context
Understand reproductive health, family planning, contraception methods, STIs, population control, and assisted reproductive technologies.