Question

Establishment of fetoplacental circulation seen at :

• A. 11 to 13 days
• B. 20 to 22 days
• C. 7 days
• D. 25 to 26 days

Answer 1

The Correct Option is B

The establishment of fetoplacental circulation is a critical event in embryonic development where the fetus connects with the placenta to receive nutrients and oxygen. This vital circulatory system between the mother and the developing embryo begins between:

• 20 to 22 days after fertilization.

During this period, several key developments occur:

• The chorionic villi form and penetrate into the maternal endometrium.
• This allows for the exchange of gases, nutrients, and waste between the fetus and mother.
• The connection ensures efficient nutrient supply, supporting rapid fetal growth and development.

Recognizing this timeline is essential in understanding prenatal development and monitoring fetal health. Thus, the correct answer to the question is:

20 to 22 days