time release progesterone implants function in contraception by a. increasing frequency in ovulation b. thickening the cervial and uterine mucus to...

time release progesterone implants function in contraception bya. increasing frequency in ovulationb. thickening the cervial and uterine mucus to impair sperm movementc. increasing gonadotropin secretion to abnomally high levels.d. reducing libidoe. activating inflammation responses in the uterus