Going on day 3 of minimal to almost no nausea. So, I’m feeling great! Some would say that’s awesome…but it makes me nervous. Hope you’re doing okay in there kiddo.
Quick little neural and embryological development update. You are at a Carnegie stage 18 now, which is 44-48 days past conception. Here is a scanning electron microscope image of what you look like:
Kind of alien-like, no? Well, your tail is almost gone so that’s progress toward human my little monkey! 🙂
Ectoderm: You now have sensory placodes (these will give rise to the sensory cells in your peripheral sense organs and also sensory cells in your brain), and your neurons are making primitive neural connections with each other. Your very first pathways, congrats! You now also have lens pits (depressions in the ectoderm that will eventually become your eye lenses), otocysts (turns into your inner ear), your nasal pits have moved ventrally, and the fourth ventricle of the brain in now present! Wow, you did a lot in the last week and half!
Mesoderm: You have a huge heart prominence (that beats and makes mommy super happy!)
Head: 1st, 2nd and 3rd pharyngeal arches are now present (see here what these arches become), you have a forebrain, eyes, and auricular hillocks (primitive ears!!)
Body: Looking at your body the most noticeable things are: the heart, liver, and umbilical cord
Limbs: You now have upper and lower limb buds, foot plates, wrists, and hand plates with digital rays (or fingers…such science-y words haha)
Only 3 more days until I get to see you again and see that little beating heart I love so much! Hang tight monkey!