
With the due date in sight, the baby that's been developing so rapidly since the day he or she was conceived will finally meet the world.
The third trimester is full of continued development, and may also be full of anxiety and complete discomfort.
Arming yourself with knowledge of what to expect in the final phase of pregnancy is important. The following is a
pregnancy calendar with brief week by week explanations of what new developments are in store for
mother and baby.
Week 28
The uterus is sitting about 3 inches above the navel. Weight gain should be somewhere between 17-24 pounds by now. Since the baby's head may be sitting on sciatic nerve, this may cause pain or discomfort in the lower back, legs and buttocks. The baby is performing a variety of functions, such as hiccupping, coughing, sucking and blinking. He or she is also positioning him or herself for delivery.
Week 29
By now, a birth plan should be put together. This would include a variety of things, such as whether or not to have an epidural, where the birth should take place, and who your labor coach will be. The baby is most likely kicking up a storm. If fewer than 10 kicks every 2 hours is felt, it may be a good idea to get checked out to ensure the baby is alright. By now, the baby's head is in proportion to the rest of the body.
Week 30
A good night's sleep will probably be hard to come by at this point on the pregnancy calendar. The increase in size of the belly will be getting in the way, and will make it difficult to get comfortable. The baby's 'lanugo' (hair on the body) is disappearing. The toenails are growing, and the bone marrow is producing red blood cells.
Week 31
The uterus is about 4.5 inches above the navel by now. As the uterus stretches, 'belly aching' may be experienced. The baby is approaching the birth length, with a little more weight left to gain. The lungs remain the only major organ left to fully develop.
Week 32
Heartburn and indigestion may be quite common by now as all the organs are being pushed out of the way by the large baby and uterus. Eating smaller, more frequent meals should help. Doctors visits will be every 2 weeks at this point. The baby is about 4 pounds, with fat still piling on. He or she is not so transparent any longer.
Week 33
It's important to ensure that you are getting enough omega-3 fatty acids (or DHA) in
your diet - or at least in
supplement form. The baby's brain and vision development are dependent on DHA. Studies suggest that almost all of the baby's accumulation of DHA occurs during the last trimester.
Week 34
Vision issues may arise around this time. Your sight may not be as sharp, and reduced tear production may leave your eyes dry and irritated. If your baby is a boy, the testicles will start to descend from the abdomen to the scrotum. About 3% - 4% of baby boys are born with undescended testicles, which is not necessarily permanent. The testicles should descend some time before he turns a year old.
Week 35
Keeping the pelvic floor muscles strong will help with labor, and will reduce the chances of bladder incontinence after childbirth. Weakened pelvic floor muscles can be conducive to urine leakage after the baby is born, and long after. Practicing 'Kegal' exercises will help to strengthen these pelvic floor muscles. These exercises are done by tightening the muscles that you would use to stop the flow of urine when you're peeing, then releasing. This should be done periodically throughout the day, every day.
Week 36
At this point, average weight gain is between 25-30 pounds. Doctor visits will probably be as frequent as once per week by now. A test for Group B Strep (short for streptococcus) will be conducted. Group B Strep is is a type of bacteria that causes illness in newborn babies, pregnant women, the elderly, and adults with other illnesses. With proper testing done prior to labor, and antibiotics taken during labor, risk of passing the bacteria onto the baby are minimal. The baby may "drop" (descend into the birth canal) any time now.
Week 37
At this point, the cervix will be checked to see if it is effaced (ripe/thinned out) and/or dilated. The baby is considered full-term at this stage of the pregnancy calendar. He or she is still growing though - 1/2 a pound per week is still being added on to the weight. The baby is preparing for birth by sucking and breathing.
Week 38
Since the breasts are beginning to produce breast milk, you may start to experience leakage. Colostrum is also being produced, which is a yellowish liquid that starts before the breast milk. This is full of antibodies which protect the baby from illness. The baby's intestines are accumulating meconium (first bowel movement). This will look like black tar the first few days after birth, which needs to be discarded from the baby's body.
Week 39
As the center of gravity shifts, feelings of imbalance or clumsiness are common. The baby is settling into the pelvis, which is called "lightening" - this will make breathing easier but walking more difficult. Since the uterus is pushing on the bladder, bathroom trips may be more frequent.
Week 40
This officially marks the end of pregnancy, although it is common for babies to be born at 41 or 42 weeks. Most doctors won't allow the pregnancy to continue past 41 or 42 weeks. He or she will recommend being induced if the pregnancy has gone on long enough.