At 39 weeks pregnant, your baby is about the size of a watermelon and pregnancy has reached full term. Most babies born from this point forward are fully developed and ready for life outside the womb.
If you are searching for 39 weeks pregnant baby size, symptoms, or signs that labor is near, this stage often brings stronger physical signals as your body prepares for birth.
Labor may begin at any time.
At 39 weeks pregnant, your baby measures about 50 to 51 cm from head to heel and weighs around 3.2 to 3.5 kilograms (about 7 to 7.7 pounds).
Here is what is happening:
• the lungs are fully mature and ready for breathing after birth
• the brain continues developing and will keep growing after birth
• body fat helps regulate temperature outside the womb
• reflexes such as sucking, grasping, and blinking are well developed
• the baby continues practicing breathing movements
• the immune system continues receiving antibodies from the mother
• most babies remain head down in preparation for birth
Your baby is now considered full term and ready for life outside the womb.
Your body is actively preparing for labor.
You may notice:
• increased pelvic pressure
• frequent urination as the baby presses on the bladder
• stronger Braxton Hicks contractions
• lower back discomfort
• swelling in the feet or ankles
• sleep discomfort
Many providers also recommend paying attention to your baby's movements during the final weeks of pregnancy. Babies should continue moving regularly even as space becomes tighter. If you notice a significant decrease in movement, contact your healthcare provider.
As your body prepares for labor, you may begin noticing stronger signals that birth is approaching.
Possible signs include:
• regular contractions that grow stronger and closer together
• lower back pain that comes in waves
• loss of the mucus plug
• increased vaginal discharge
• a feeling of pressure in the pelvis
• rupture of the amniotic sac, often called water breaking
Labor can still begin gradually, and these changes may happen hours or days before active labor begins.
The final days of pregnancy often bring a mix of anticipation and focus.
You may experience:
• excitement about meeting your baby
• impatience as the final days pass
• heightened awareness of your body’s signals
Supporting calm breathing and emotional steadiness can help you stay grounded as labor approaches.
Stay attentive to contractions
• notice timing and intensity if contractions begin
Prioritize rest
• conserving energy can support the upcoming work of labor
Maintain calm breathing
• breathing and relaxation practices can help your nervous system remain steady.
Sit comfortably and place one hand on your belly.
Take a slow breath in through your nose and feel your belly gently expand.
Exhale slowly and imagine your body releasing tension.
Allow your breathing to become slow and steady.
Take a few quiet moments to connect with the calm strength within you.
At full term, your body and baby are both ready for the process of birth.
Approaches such as hypnobirthing focus on breathing, relaxation, and working with the body’s natural rhythms during labor.
The MamaZen app includes guided hypnobirthing sessions designed to support calm focus and confidence during birth.
Listen to this week’s episode of the Pregnancy Week by Week Podcast for a deeper explanation of 39 weeks pregnant development and a guided moment of calm as you approach birth.
Coming soon.
At 40 weeks pregnant, your baby reaches the estimated due date and continues preparing for birth if labor has not yet begun.
As the final days of pregnancy unfold, maintaining calm and emotional balance can support both your body and your baby.
MamaZen offers guided sessions designed to support:
• relaxation before labor
• emotional balance
• sleep during late pregnancy
• hypnobirthing preparation
Support during pregnancy is not only physical. It begins with calming your internal state.
39 Weeks Pregnant: Full Term and Ready for Birth
At 39 weeks pregnant, your baby measures about 50 to 51 cm from head to heel and weighs around 3.2 to 3.5 kilograms.
Yes. Thirty nine weeks is considered full term pregnancy and is often the recommended time for delivery when possible.
Signs may include regular contractions, pelvic pressure, back discomfort, and the loss of the mucus plug.
Babies should still move regularly at 39 weeks. Movements may feel different due to limited space, but consistent movement should continue.
At 39 weeks pregnant, your baby has reached full term and is ready for life outside the womb.
Your body is also preparing for the process of labor.
Move forward with calm awareness as the moment of meeting your baby approaches.
Founder of MamaZen
This content is for informational purposes only and does not replace medical advice. Always consult your healthcare provider with questions about your pregnancy.
Get expert tips to raise confident kids.
Enter email for access!