You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Embryonic period is upto and explain in detail?
Embryo refers to the product of conception from the day of feilization to 8 weeks Prenatal period Ovum- 0-2 wks Embryo- 3-8wks Foetus- 9wks - bih Postnatal period Newborn- first 4wks after bih Infant- Bih to 12months Toddler- 1yr to 36 months Preschool child- 37 to 72 months School age child- 73 months to 12yrs Adolescence Early- 10-13 yrs Middle- 14-16 yrs Late- 17-20yrs Ref: Ghai, 9th edition, Chapter 2, Table 2.1