In Depth Baby Product Reviews Led by a Pediatrician

Big Changes for Small Things

Little things become big things with enough time and nourishment
Big Changes for Small Things
Credit: macrovector ©
Sunday September 22, 2019

This week your little one is about a quarter of an inch long and about the size of a lentil bean. Her heart will start beating around 22-23 days after fertilization, which is the first organ to develop. This tiny embryo has circulating blood, and if you have a 6-week ultrasound, the doctor or technician might be able to locate the fetal heartbeat (though week 7 increases these odds).

While your pregnancy is still in its infancy (pun intended), and your tiny embryo is small, big things are happening, and many developments are in the works. The foundation for your baby's respiratory (lungs), hepatic (liver), and optic (eye) systems are all starting. The thyroid and pituitary glands are also taking shape, and the folds of tissue near the "top" of the embryo will develop into a jaw, cheeks, and chin, with small spots where his eyes and a nose will appear in a few weeks. Also busy developing are ear canals, brain, muscles, and bones.

Honest, objective reviews. Led by a Pediatrician.

BabyGearLab was founded by a Pediatrician Mom with a mission to provide a reliable, independent, source of information to new parents. Our experts have tested thousands of baby and kids products to share key performance, health, and safety findings. We spend tens of thousands of dollars crash testing car seats to inform our ratings. And, we combine our review work with gobs of expert parenting advice. To assure complete independence, we buy all the products we test ourselves. No sponsored content. No ads. Just real, honest, side-by-side testing by people who care.

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