Gynaecology & Obstetrics All of the following mechanisms of action of oral contraceptive pills are true, except: A Inhibition of ovulation B Prevention of fertilization C Interference with implantation of fertilized ovum D Interference with placental functioning 💡 Explanation All of the following mechanisms of action of oral contraceptive pills are true, except: ✓ Correct Answer: D. Interference with placental functioning