Explanation

Development periods It includes embryonic or prenatal and post embryonic or postnatal (natal concerning birth) (i) Embryonic period (prenatal period) In human beings is passed in mother’s womb (uterus). It includes the events from the formation of an embryo till the time of birth (ii) Post embryonic period (postnatal period). This period is passed outside the mother’s womb. It includes events from birth to the death