This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatric Surgery, Subject name: Surgery
Regression of midgut herniation during embryogenesis occurs at: 
Select and explain. 
A. 6 weeks, B. 10 weeks, C. 16 weeks, D. 20 weeks
B: 10 weeks
Answer: B: 10 weeks 
Explanation: Physiological umbilical hernia occurs at week 5 of intrauterine life. Regression of hernia occurs at week 10 Defect in regression causes omphalocele