So Amanda and I read this about our baby going through week seven. Crazy stuff:
This week your baby is undergoing some extraordinary changes and developments. The head, heart, spinal cord, and some of the larger blood vessels begin to form. 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. The bones of his tiny limbs have started to form and all of your baby’s major organs – heart, intestines, kidneys, liver, lungs and pancreas — are forming and growing. In fact, your baby actually goes through 3 sets of kidneys during development with this week’s development, being the second set.
Both the hand plates and the genital tubercle are present this week, but you can’t tell whether it’s a boy or a girl by sight at this point. Nasal pits are also forming. In your womb, your baby has already become active swimming around inside the amniotic sac and kicking. However, as he’s much too small and well-cushioned by the uterus and the new amniotic fluid you won’t be able to feel him yet. But don’t worry. In a few months you’ll be able to feel him constantly.