37 Weeks

Week 37 of Pregnancy: Full-Term Baby

Your baby is gaining weight at about half an ounce per day. Since your little one is considered full-term now, if your baby was to leave the wet nest this week, he or she would likely thrive. That's because Mother Nature and you have done such a fine job.

With just three more weeks to go and at about six and a half pounds (though weight and height vary from fetus to fetus), your baby is doing just fine. You can expect weight gain to be about half an ounce per day. (Boys, though, are likely to be heavier at birth than girls. And here's a bit of boy baby trivia to back that one up: Moms carrying boys tend to eat more than moms carrying girls — a foreshadowing of teenage refrigerator raids to come.)  Since your little one is considered full-term at 37 weeks pregnant, if your baby was to leave the wet nest this week, he or she would likely thrive. That's because Mother Nature and you have done such a fine job.
 
So what's keeping your little one busy while waiting it out until D-day? Practice, practice, practice. Your baby is simulating breathing by inhaling and exhaling amniotic fluid, sucking on his or her thumb, blinking, and pivoting from side to side (one day you feel the tushy on the left side, another day it has swung around to the right side). All these are skills needed for his or her next gig  — starring as newborn.

Here's an interesting fact: Your baby's head (which, by the way, is still growing) will, at birth, be the same size circumference as his or her hips, abdomen, and shoulders. And guess what's making an impression (literally) these days on those shoulders and hips: fat — causing little dimples in those cute elbows and knees, shoulders and hip, and creases and folds in the neck and wrists.

36 Weeks

 Week 36 of Pregnancy: Fetal Skull and Bones

Your little one is now about six pounds in weight and measures slightly more than 20 inches in length. Growth will slow down now in preparation for birth, so your baby will be able to fit the narrow passageway to the outside and so he or she can store up the energy needed for delivery.

Your baby's skull isn't the only soft structure in his or her little body. Most of your baby's bones and cartilage are quite soft as well (they'll harden over the first few years of life) — allowing for an easier journey as your baby squeezes through the birth canal at delivery (and less prodding and poking for Mom along the way). At 36 weeks pregnant, the skull bones are also not fused together yet so that the head can easily (well, relatively easily) maneuver through the birth canal.  
So your little bruiser (who you've now learned won't be bruising you all that much with those soft bones) is now about six pounds in weight and measures slightly more than 20 inches in length. Growth will experience a slowdown now, both so your baby will be able to fit the narrow passageway to the outside and also so he or she can store up all the energy needed for delivery.

By now, many of your baby's systems are pretty mature, at least in baby terms —  and just about ready for life on the outside. Blood circulation, for instance, has been perfected and your baby's immune system has matured enough to protect him or her from infections outside the womb. Other systems, however, still need a few finishing touches. Once such notable example: digestion — which actually won't be fully mature until sometime after birth. Why's that? Inside his or her little gestational cocoon, your baby has relied on the umbilical cord for nutrition, meaning that the digestive system — though developed — hasn't been operational. So your baby will take the first year or two to bring that system up to speed.
 

Week 35 of Pregnancy: Fetal Weight Gain

With five more weeks to grow, your baby is accumulating fat at a rapid pace, but he or she has pretty much reached the in utero limit in height by now. Which means your developing baby's once skinny arms and legs are now quite plump…and irresistibly, squeezably soft.

At about 20 inches and five and a half pounds (but with about five more weeks to grow), most of your baby's growth over the next month or so before you meet will be in weight (with a gain of anywhere from one pound to several), not height (baby's pretty much reached the in utero limit in that department).  Accordingly, fat continues to accumulate at a rapid pace these days (on baby, not just on your hips). Back in the middle of your pregnancy, your baby's weight was made up of only two percent fat; now at 35 weeks pregnant, that percentage has soared to closer to 15 percent (and will increase to 30 percent at term). Which means your baby's once skinny arms and legs are now quite plump…and irresistibly, squeezably soft.
 
Also continuing to grow at an amazing pace is your baby's brain power. Luckily, the part that surrounds that amazing brain — the skull — remains soft. And for good reason: A soft skull will allow your baby to squeeze more easily through the birth canal. (Mother Nature was really thinking this one through — imagine trying to push out a rock-hard head…ouch!)

34 weeks

Week 34 of Pregnancy: Gender Differences

Your baby could be as tall as 20 inches right now and could weigh about five pounds. Need a visual? Hold a five-pound bag of flour in your arms and imagine it's your soon- to-be-born baby (cradle it, and you'll only get strange looks in the baking aisle).

Your baby could be as tall as 20 inches  right now and about five pounds. Need a visual? Hold a five-pound bag of flour in your arms and imagine it's your soon-to-be-born baby (cradle it, and you'll only get strange looks in the baking aisle). Then stack three such bags one on top of the other (and get ready for some more strange looks, maybe from the same clerks who saw you grinning and holding that one-pound box of sugar a few weeks ago). That's how tall your baby is at 34 weeks pregnant. (Now go bake some oatmeal raisin cookies with all that flour!) 
  
If your little doughboy is, well, a boy, then you'll be pleased to know that this week his testicles are making their way down from his abdomen to his scrotum. (Some baby boys — three to four percent — are born with undescended testicles, but they usually make the trip down sometime before the first birthday.) 
  
Your baby's fingernails now reach the end of the fingertips and may even curl over the tip, making a manicure one of the first things you'll need to do for your little bundle.