Pharmacology The combined estrogen-progestin oral contraceptive pill act mainly by: A Production of cervical mucus hostile to sperm penetration B Making endometrium unsuitable for implantation C Suppression of FSH and LH release D Enhancing uterine contraction to dislodge the feilized ovum 💡 Explanation The combined estrogen-progestin oral contraceptive pill act mainly by: ✓ Correct Answer: C. Suppression of FSH and LH release