Third Trimester of Pregnancy

The third trimester of pregnancy starts around week 28 and continues until delivery. Most babies are born around 40 weeks, though this can vary.

At the beginning of this trimester, the fetus is over a foot long. By week 32, the baby gains weight rapidly, its eyes can sense light, and bones are fully formed but soft. Around 36 weeks, bones harden, but skull bones remain soft for easier passage through the birth canal. The baby usually moves to a head-down position in preparation for birth, and all organs are ready to function independently by the end of this period.

The third trimester can bring increased discomfort due to the growing baby pressing on organs. Common symptoms include shortness of breath, heartburn, swelling, tender breasts with potential colostrum leakage, an outie belly button, sleep difficulties, hemorrhoids, and Braxton Hicks contractions. True labor contractions also occur during this time.

It is important to consult a healthcare provider for any questions about fetal development or concerns about maternal well-being during the third trimester.