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Baby Chris is Three Weeks Old

April 15, 2019/0 Comments/in Uncategorized /by Kelsey Hazzard

[This is part 4 of a multi-part series chronicling a pregnancy through the lens of “Baby Chris.” Click here for other parts.]

Thump-thump, thump-thump, thump-thump. What’s that sound? Three weeks after fertilization, Baby Chris has reached a significant developmental milestone: his or her heart is beating! The embryonic heart is currently tube-shaped, but already performing the critical function of delivering nutrients throughout the body to allow continued growth. Baby Chris’s heart will beat 54 million times before he or she is born.

Khan Academy has a nice summary of what has happened in Baby Chris’s life so far:

Last week, we mentioned that Baby Chris’s body was beginning to divide into three sections known as germ layers: the endoderm, mesoderm, and ectoderm. That process, known as gastrulation, is now complete. The endoderm will become the liver, pancreas, bladder, digestive tract, and respiratory tract. The mesoderm is home to the heart, kidneys, bones, cartilage, muscles, and blood vessels. The ectoderm will become the brain, spinal cord, nerves, skin, nails, and hair.

Illustration of an 18-day-old human embryo

In the ectoderm, the nervous system is starting to take shape. The neural tube sets the stage for the spinal cord, and three brain structures can be seen: the forebrain, midbrain, and hindbrain. Many pregnant mothers supplement their diets with folic acid, which has been shown to reduce the risk of neurological developmental problems.

Don’t forget: you can learn more about Baby Chris’s 9-month journey by downloading the See Baby app on your smartphone!

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Tags: Baby Chris, fetal development
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https://secularprolife.org/wp-content/uploads/2021/10/SecularProlife2.png 0 0 Kelsey Hazzard https://secularprolife.org/wp-content/uploads/2021/10/SecularProlife2.png Kelsey Hazzard2019-04-15 11:55:002021-11-08 12:16:36Baby Chris is Three Weeks Old
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