Gynaecology & Obstetrics With a sensitive test, hCG can be detected in maternal serum or urine by —— after ovulation? A 3 to 4 days B 8 to 9 days C 12 to 14 days D 20 to 21 days 💡 Explanation With a sensitive test, hCG can be detected in maternal serum or urine by ------ after ovulation? ✓ Correct Answer: B. 8 to 9 days