As these blood vessels form, the heart begins to pump fluid through them, and your baby's first red blood cells are created. Your baby
is about 7 - 9 mm or 0.27 - 0.35 inches in length, (approximately the size of
a grain of
rice), and weighs about 1/30 of an ounce - less than a breath mint.
Your baby's brain, bladder, tongue and esophagus are all developing and transforming, while his eyes are moving to the front of the face and his tiny eyelids are forming.