This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fetal Skull and Maternal Pelvis, Subject name: Gynaecology & Obstetrics
Following delivery, uterine fundus lies about: 
Select and explain. 
A. 10 1/2 " above pubic symphysis, B. 8 1/2 " above pubic symphysis, C. 5 1/2 " above pubic symphysis, D. 2 1/2 " above pubic symphysis
C: 5 1/2 " above pubic symphysis
Answer: C: 5 1/2 " above pubic symphysis 
Explanation: Ans. C. 5 1/2 above pubic symphysisFollowing delivery, the fundus lies about 13.5cm(51/2) above the pubic symphysis. During the first 24 hrs the level remains constant, thereafter there is steady decrease in height by 1.25cm in 24 hours so that by the end of 2nd week the uterus becomes a pelvic organ. These measurements are clinically significant to know the process of involution. If the height is more than the period of puerperium, it may be because of subinvolution.