This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Term period for embryonic period: September 2006 \nSelect and explain. \nA. 0-14 days of gestation, B. 14 days to 9 weeks of gestation, C. 9 weeks to bih, D. 22 weeks intrauterine to 7 days after bih', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: 14 days to 9 weeks of gestationThe embryonic period in humans begins at feilization (12-24hrs after ovulation, generally between the 2nd and 3rd week of gestational age) and continues until the end of the 9th week of gestation (8th week by embryonic age).', 'role': 'assistant'}]