Third Trimester Pregnancy Guide
The final stretch! Weeks 28–40+ are when your baby gains most of its weight, positions for birth, and prepares to breathe air. For you, it’s time to prepare for labor, pack your hospital bag, and write your birth plan.
What Happens in the Third Trimester?
The third trimester is the home stretch of pregnancy. From week 28 to delivery, your baby undergoes rapid weight gain — going from about 1 kg at week 28 to an average of 3.4 kg at full term. The lungs mature, the brain makes critical connections, and the baby positions head-down in preparation for birth. This trimester is physically demanding for the mother as the uterus grows to maximum size.
The third trimester brings new symptoms: back pain, Braxton Hicks contractions, shortness of breath (relieved when baby drops), frequent urination, swollen ankles, and difficulty sleeping. These are all normal as your body prepares for labor.
Week by Week: Third Trimester
Third Trimester Checklist
Pack by week 35. Include clothes for you and baby, ID, insurance, birth plan, toiletries.
Install the infant car seat by week 36. Many fire stations offer free checks.
Discuss pain management, labor preferences, and newborn care wishes with your provider.
Regular contractions, water breaking, bloody show — know when to call and when to go.
Frequently Asked Questions
Common questions answered by our medical team