Baby: Week 22

You’re now on a regular napping and waking cycle!

Human foetus 22 weeks after conception. Photo credit - Oxford Scientific

You weigh more than 600g, and may be as long as 30 cm, and you’re starting to fill the space in your womb. Your brain is growing quickly. Lung branches continue growing, along with lung cells that produce surfactant, which inflates the air sacs after birth when you cry for the first time.[1]

Your hair is growing well, but the locks are still white, with no pigment yet.[2] 

You’re now on a regular napping and waking cycle![3]

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Langmans Medical Embryology, Ninth Edition, TW Sadler, 2003

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