Gynaecology & Obstetrics All of the following statements regarding the mechanism of action of combined oral contraceptive drugs are TRUE, EXCEPT: A Progestins prevent ovulation by suppressing LH release B Progestins cause thickening of cervical mucus and prevent sperm passage C Estrogen modifies tubal and uterine contractions and prevent feilization D Estrogen makes endometrium hyperproliferative and hypersecretory and prevents implantation 💡 Explanation All of the following statements regarding the mechanism of action of combined oral contraceptive drugs are TRUE, EXCEPT: ✓ Correct Answer: C. Estrogen modifies tubal and uterine contractions and prevent feilization