This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development period- week 1,2,3,4, Subject name: Anatomy
Embryonic period of development is: 
Select and explain. 
A. Up to 16 weeks, B. Up to 12 weeks, C. Up to 10 weeks, D. Up to 8 weeks
D: Up to 8 weeks
Answer: D: Up to 8 weeks 
Explanation: Stages of Prenatal development 1. Germinal stage (0-2 weeks) : Thegerminal stageis the period of gestation from feilization or conception, when the egg meets the sperm, to implantation of the embryo in the uterus 2 Embryonic Stage (3-8 weeks) : Embryonic period extends from beginning of the third week to the end of eighth week of intrauterine life. 3 Fetal Stage (9 weeks to bih) : Once cell differentiation is mostly complete, the embryo enters the next stage and becomes known as a fetus. The fetal period of prenatal development marks more impoant changes in the brain. This period of development begins during the ninth week and lasts until bih.