Week 39 of Pregnancy
Third trimester
Baby is
about the size of a small watermelon
19.5 to 20 inches · 7 to 7.5 pounds
Baby this week
- •Fully developed and ready for birth
- •Practicing breathing movements and swallowing
- •Most babies are in head-down position by now
- •Vernix (protective coating) is decreasing as birth nears
- •Lanugo (fine body hair) has mostly shed
You this week
- •Braxton Hicks contractions may intensify
- •Increased pressure and heaviness in the pelvis
- •Possible loss of mucus plug (a brownish or clear plug)
- •Fatigue mixed with nervous energy about labor
- •Lower back discomfort and pelvic pressure
- •Difficulty sleeping due to discomfort and anticipation
- •Possible loose stools as the body prepares for labor
This week's tips
- •Rest as much as possible—your body is preparing for the physical demands of labor
- •Keep your hospital bag packed and easily accessible
- •Review your birth plan and labor expectations with your partner
- •Try gentle movement like walking or pelvic rocks to encourage optimal positioning
- •Stay hydrated and eat small, nutritious meals to maintain energy
- •Practice relaxation techniques (breathing, visualization) for labor readiness
- •Have your support person's phone numbers and your hospital's directions readily available
Looking ahead
You're in the final stretch. While most babies arrive around week 40-41, some come this week. Pay attention to signs of labor—regular contractions, loss of mucus plug, and your water breaking—and don't hesitate to contact your provider with questions or concerns.
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