Seventeen weeks after fertilization (19 weeks LMP), Baby Chris is about six inches long and weighs a bit more than half a pound—about the size of a tomato.
|Photo by Melanie Brown on Unsplash|
Baby Chris has also developed vernix, "the waxy or cheese-like white substance found coating the skin of newborn human babies." The exact function of vernix is unclear; the leading hypothesis is that it has something to do with protecting the baby's skin from potentially damaging effects of amniotic fluid.
To learn more about prenatal development, download the free See Baby app wherever mobile apps are sold.