Gynaecology & Obstetrics Levonorgestrol containing IUCD prevents pregnancy primarily due to: March 2007 A Making endometrium unreceptive B Suppressing ovulation C Initiating inflammatory changes within the endometrium D Making cervical mucus thin 💡 Explanation Levonorgestrol containing IUCD prevents pregnancy primarily due to: March 2007 ✓ Correct Answer: A. Making endometrium unreceptive