Gynaecology & Obstetrics To obtain obstetric conjugate, which of the the following factor should be subtracted from the diagonal conjugate? A 0.5 cm B 1.5 cm C 2.5 cm D 3.0 cm 💡 Explanation To obtain obstetric conjugate, which of the the following factor should be subtracted from the diagonal conjugate? ✓ Correct Answer: B. 1.5 cm