Gynaecology & Obstetrics Which of the following is true regarding relaxation of pelvic joints at term in pregnancy A Is permanent and not accentuated in subsequent pregnancies. B Allows for an increase in transverse diameter of the mid - pelvis. C Results in marked mobility of pelvis at term because of downward gliding movement of the sacroiliac joint. D Displacement of sacroiliac joint increase outlet diameters by 1.5 to 2.0 cm in dorsal lithotomy position. 💡 Explanation Which of the following is true regarding relaxation of pelvic joints at term in pregnancy ✓ Correct Answer: D. Displacement of sacroiliac joint increase outlet diameters by 1.5 to 2.0 cm in dorsal lithotomy position.