Week 29

Your baby’s bones have completely matured at this gestational marker, although they remain supple. Your baby is gearing up for an increase surge in growth.

Weighing in at nearly 3 pounds and a little over 10 inches in length, your baby’s actions are now robust, even making you gasp at times! Your baby may be just about 3 inches away from his or her delivery day length but still needs to gain some more weight. By the time delivery day is here, your baby will have at least doubled or nearly tripled this week’s weight.

Week 30

Wow! Thirty weeks have flown by. Your baby’s eyes are now open for a fair amount of the day. A hefty head of hair may be seen as well. His or her brain is continuing to grow and mature; additional furrows and creases are noted on the exterior. This gives your baby’s tiny brain tissue the necessary space to increase as baby matures after birth.

Your baby will perform breathing actions while moving his or her diaphragm steadily. Your tummy may shudder when this takes place.

Week 31

The central nervous system is now developed to the point where your baby’s body temperature is controlled by the brain. Your baby’s brain, body and systems are now working together using all five senses and trillions of brain connections to grow. Little lungs are growing too but are not complete.

Your baby’s sexual development progresses; testicles are descending from the kidneys to the groin to the scrotum in boys. The labia continue developing but will cover the clitoris, which is observable in girls.

As opposed to sleeping, your baby is now enjoying more awake time and activity, which will probably be obvious to you. Your baby is now over 3 pounds and measuring 11 inches from crown to rump.

Week 32

Little toenails can be seen! Your baby is busily working on breathing, sucking and swallowing for delivery day, even though his or her tiny lungs are not yet fully developed. Iron and calcium are just two of the essential minerals your baby is now starting to take in and utilize via the intestinal tract. Since your baby began regulating his or her body temperature last week, insulating silky velvety hair, lanugo, is now beginning to disappear. Your baby’s skin has lost its translucency and is beginning to look more like yours.

Your baby is measuring about 11½ inches long, about the length of a crisp stalk of celery, and weighing about 3¾–4 pounds.

Week 33

At 33 weeks your baby’s eyes are quite remarkable and now focusing. Your baby can detect light as it enters his or her eyes; pupils are dilating and constricting. Over the next four weeks an amazing amount of growth will take place. Tiny lungs are working hard on maturing.

Your amniotic fluid is now at its greatest capacity within the uterus. As little kicks, jabs, twists, punches and twirls continue to be counted and felt, they may be a little more noticeable and forceful. Due to your baby’s rapid growth from now to delivery day and his or her greater size in your uterus, your level of amniotic fluid is not as cushioning.

Your baby may have added an inch in length this week and weighs approximately 4½ pounds. Your baby is the size of a small watermelon.

You may also begin preparing for breastfeeding by reading and researching this exciting topic.

Week 34

Tiny fingernails are complete. The vernix caseosa, the pale whitish layer that shields your baby’s skin has thickened. Your baby is gaining significant weight over the next four weeks. Now at 5½ pounds, possibly adding a half a pound a week, your baby’s is now about 12 inches long and weighs the same as 22 quarter pounders!

Week 35

Sometime between Weeks 32-36, your baby will most likely be in a vertex position, the ideal head-down position in the pelvis ready for delivery day! However, babies may also present in a breech position with your baby’s feet presenting first in the pelvis or a transverse position with your baby lying sideways.

If your baby is not in a vertex position, speak openly with your health care team about this concern. A procedure may be recommended to try and rotate your baby. Do your research and make this decision carefully with your health care team. If you decide to have this procedure performed, make sure that you have the umbilical cord and placenta visualized beforehand.

Your baby’s brain is maturing rapidly. Essential fat is accruing particularly in the shoulder area.

Your baby is putting on a half a pound a week and plumping up little limbs! Now roughly 18 inches long, your baby’s is nearing delivery day length.

Week 36

Now your baby’s skin is now becoming free of wrinkles with no slack. A tiny face is now perfectly circular as little muscles have matured, and sucking will soon be required in providing nourishment upon delivery. Your baby’s skull is supple and pliable and will remain so until delivery; other bones continue to solidify.

Continue to Track Your Baby’s Daily Movements Until Your Baby is Born. Your baby’s movements & heart rate will basically stay the same now. Movements may or may not become less defined as specific punches and kicks, they can feel more like twirls, twists and jiggles. If you notice any changes in your baby’s movement patterns, such as a decrease, increase, or absence in fetal movement, CALL your health care team immediately to make sure baby is well. If you are unable to reach or visit your health care team, go to Labor & Delivery or the Emergency Room. Do not wait until the next day or next appointment! Always trust your instincts.

Your baby is now tipping the scales at around 6 pounds.

Your baby is now weighing over 6 pounds.

Week 37

Your excitement is building! Your baby is officially deemed full term. All organs are all set to perform on their own. If your baby is not already in the head-down position yet, this could be the week!

Your baby is currently on the homestretch and the once rapid weight gain of the last four weeks is slowing significantly. Your uterus will still allow for a little more growth as baby fat (essential fat) continues to develop. This fat surrounds your baby and will provide warmth once born. An ultrasound at this time may be done to guesstimate baby’s size. To do this, your baby’s head, stomach and femur dimensions will be assessed.

Your baby is now weighing over 6 pounds.

Week 38

Your baby continues to master a strong grasp. Tiny toenails sit at the tops of little toes. Your baby’s brain weighs just under a pound and this growth continues after delivery. The brain is maturing and will aid in perfecting breathing, enhancing digestion, controlling and normalizing heart rate, and getting the baby ready for eating. Your baby’s organs will complete final maturation as nervous system abilities are enhanced; tiny complex systems and functions keep progressing as your baby prepares for birth. Lanugo is barely present on the skin.

Your baby could possibly weigh about 6½ pounds and reaching the final birth length.

Week 39

Your baby’s chest is becoming increasingly dominant. The testes continue descending into the scrotum for boys. The placenta is hard at work furnishing your baby with antibodies that will assist him or her in combating infections following delivery.

Continue to Track Your Baby’s Daily Movements Until Your Baby is Born. Your baby’s movements & heart rate will basically stay the same now. Movements may or may not become less defined as specific punches and kicks, they can feel more like twirls, twists and jiggles. If you notice any changes in your baby’s movement patterns, such as a decrease, increase, or absence in fetal movement, CALL your health care team immediately to make sure baby is well. If you are unable to reach or visit your health care team, go to Labor & Delivery or the Emergency Room. Do not wait until the next day or next appointment! Always trust your instincts.

Week 40-42

Hooray! Congratulations on completing the fortieth and final week of your third trimester! You and your baby have reached the expected due date originally calculated at your first office visit in Week 8—an incredible milestone.
At this stage, your baby may measure around 18-20 inches in length and weigh between 6-9 pounds. Remember, healthy babies come in all shapes and sizes—short or long, lean or chubby. No matter what, every baby born safely alive and kicking is nothing short of miraculous!

If Baby Hasn’t Arrived Yet

If your baby has not arrived on time, please don’t be surprised or upset. Many moms have babies past Week 40; this is a crucial time during pregnancy as the amniotic fluid surrounding your baby is beginning to decrease and the placental function needed to sustain your baby’s life may be beginning to slow. You will need to discuss with your health care team the probability of when to expect your baby’s arrival or the possibility of planning your baby’s delivery day.

Now is the time to discuss with your healthcare team:

• How long past your due date can you wait if labor doesn’t start on its own?
• What additional monitoring will be required? Will tests like daily NSTs (Non-Stress Tests) or more frequent BPPs (Biophysical Profiles) be needed?
• Is an induction necessary? If so, when and what does it involve?
• What about a scheduled C-section?
• What is your healthcare team’s overall plan and protocol?

Sometimes the birth plan doesn’t go exactly as planned or even desired. If your plan becomes altered, you should be educated and familiar with your options ahead of time. This will help ensure that you are comfortable making the very best decisions for you and your baby with your team.

Don’t forget to do your daily movement counting! If you notice any changes in your baby’s movement patterns, such as a decrease, increase, or absence in fetal movement, CALL your health care team immediately to make sure baby is well. If you are unable to reach or visit your health care team, go to Labor & Delivery or the Emergency Room. Do not wait until the next day or next appointment! Always trust your instincts.

A healthy outcome for you and your baby is paramount after the 40-week gestational marker has elapsed. Pay extremely close attention to any changes in your or your baby’s health; this is key. Contact your health care team at any time with any questions or concerns you have until your baby is safely in your arms.

Mama, you’ve got this!