This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
Embryonic period is up to: 
Select and explain. 
A. 8 weeks, B. 10 weeks, C. 12 weeks, D. 6 weeks
A: 8 weeks
Answer: A: 8 weeks 
Explanation: a. 8 weeks(Ref: Nelson's 20/e p 84, Ghai 8/e p 96)Embryo refers to the product of conception from the day of fertilization (generally 14th day post ovulation) to 8weeks.