2 ч 4 мин, 26 май 2020 г. - Weeks 21-30

Описание:

The development of weeks 21-30 are characterized by weight gain. This is essential for maintaining a stable temperature after childbirth. At this point bone marrow has completely taken over the production of erythrocytes. Axons in the spinal cord begin to become myelinated. The fetus is growing eyelashes, and the eyes are open and begin to blink. Surfactant is produced in the lungs.

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