Answer: C. Any time during the menstrual cycle
A systematic review concluded that outcomes of continuation, effectiveness and safety were no better when a copper IUD was inserted during menses and that requiring a woman to be menstruating is an obstacle to access.
3. The primary mechanism of a contraceptive implant is:
A. Suppression of ovulation
B. Thickening of cervical mucus
C. Alteration of the endometrial lining
Committee on Practice Bulletins—Gynecology, Long-Acting Reversible Contraception Work Group. Practice Bulletin Number 186: Long-Acting Reversible Contraception: Implants and Intrauterine Devices. Obstet Gynecol.2017 Nov;130(3):e251-e269.