Question

Question 1: जन्मपूर्व विकास अवस्था -दिवसांची असते. ​

Answer 1

2 Weeks

• The first two weeks, the embryonic period, and the foetal period are the three main stages of prenatal human embryologic development. Fertilization, blastocyst creation, implantation, and continued trophoblast and embryoblast development make up the first two weeks of development. Weeks 3 through 8 of development are referred to as the embryonic period, whereas weeks 9 through to term are referred to as the foetal period.
• The embryonic stage is crucial because all the major internal and external organs form during this time, and differentiation is essentially complete by the conclusion of the stage.
• All of the bones and joints have an adult-like structure and organisation. Teratogen exposure during this time can result in severe congenital abnormalities. The limbs develop and grow during the prenatal period as a result of a continuous remodelling and reconstruction process that allows bones to keep their distinctive structure. In the skeleton generally, the growth increments of individual bones are in exact proportion to those of the skeleton overall. Collagen content in the ligaments increases, bursae form, tendinous attachments move to make room for growth, and epiphyseal cartilage develops blood vessels.

Hence, the prenatal phase is the first 2 weeks.

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