Today marks 31 weeks! Woooo whoo!

What’s keeping Tiny busy this week: Your not-so-little-one is just a bit closer to their birth weight and height at around 4 pounds and 17 inches. With each added layer of baby fat, your baby’s skin starts to look more and more like it will when they finally get to see the light of day. The heavy news: you can expect your miracle-gro muffin to gain about a half a pound of weight per week from now until about two weeks before birth. Great. That’s just what you needed. Even more weight to carry around! Your baby’s still-developing immune system has gained substantial strength over the past few weeks getting them in full gear to face our disease-ridden world o’ wonders. Obviously, a large majority of your child’s immune strength will be derived from exposure to breast milk as well as the outside elements. Their cute little noggin’ (which could already be covered with luscious locks or just purty peach fuzz), is still soft because the skull bones have not yet fused together. As much as that sounds a little too vulnerable, their “skull softness” allows for a much smoother passage through the birth canal during labor—something both you and your little swimmer will appreciate when it’s finally time to “go!” Also, some babies will have that “soft spot” on their head for up to one year after birth.

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