Week 35 of Pregnancy
Learn about your baby's development and what to expect at 35 weeks pregnant.
Baby's Size This Week
Baby Development at Week 35
- ● At week 35, your baby is about 46.2 cm long and weighs around 2383g.
- ● The lungs are nearly mature — surfactant production is well-established, and the risk of respiratory distress syndrome drops significantly after 35 weeks.
- ● Most major organ systems are fully developed; the kidneys are mature and the liver can process some waste products.
- ● Your baby is getting into a head-down (vertex) position and may be descending further into the pelvis, causing you to feel increased pelvic pressure.
- ● The immune system is receiving a final boost of maternal antibodies across the placenta, which will protect your baby in the first months of life.
- ● Fat accumulation continues to round out your baby's features — cheeks are filling in, and the arms and legs are looking increasingly plump and full.
Your Body at Week 35
- ● As week 35 approaches, you may notice increased pelvic pressure and a sensation of heaviness as the baby descends.
- ● Nesting instincts often kick in strongly at this stage — channel the energy wisely and avoid overexertion or exposure to harsh cleaning chemicals.
- ● Cervical changes may begin; your doctor or midwife will monitor effacement and dilation at prenatal visits, which will now move to weekly.
- ● Braxton Hicks contractions are intensifying and may be harder to distinguish from early labor — track their frequency and call your provider if they become regular.
- ● Fatigue returns with intensity as your body carries maximum pregnancy weight and prepares for labor.
- ● You may notice the mucus plug begins to dislodge in small pieces — this is normal and can occur weeks before labor, though it can also signal impending delivery.
Week 35 Checklist
- ☐ Attend prenatal visits — appointments shift to weekly starting at 36 weeks; confirm timing with your provider.
- ☐ Complete your Group B Streptococcus (GBS) test at your 35–37 week appointment — a vaginal and rectal swab to check for GBS bacteria.
- ☐ Ensure your hospital bag is fully packed and in the car or by the door.
- ☐ Confirm your infant car seat is properly installed and inspected by a certified technician.
- ☐ Practice relaxation and breathing techniques for labor daily to build muscle memory for coping with contractions.
- ☐ Finalize your postpartum care plan: who will be at home, meals, and lactation support — have your lactation consultant's number ready.
Frequently Asked Questions
What should I expect at 35 weeks pregnant?
At 35 weeks pregnant, you are in the third trimester with about 5 weeks to your due date. Your baby is about the size of a Honeydew melon (46.2 cm) and has nearly mature lungs and a robust immune system. Common symptoms include pelvic pressure, intensifying Braxton Hicks contractions, nesting, fatigue, and possible mucus plug changes. Always consult your healthcare provider for personalized guidance.
How big is my baby at 35 weeks?
At week 35, your baby is approximately 46.2 cm in length and weighs around 2383g — roughly the size of a Honeydew melon. These measurements are averages based on WHO fetal growth charts; individual babies vary naturally in size.
What is the GBS test and why is it done at 35–37 weeks?
Group B Streptococcus (GBS) is a common bacterium carried by approximately 25% of healthy adults. In adults it is harmless, but if a baby is exposed to it during delivery, it can cause serious infection including pneumonia, meningitis, or sepsis. The GBS swab test (done between 35–37 weeks) checks for the presence of GBS in the vagina and rectum. If positive, intravenous antibiotics are administered during labor to protect the baby.
What does losing the mucus plug mean at 35 weeks?
The mucus plug is a thick collection of mucus that seals the cervix during pregnancy to protect the uterus from infection. As the cervix begins to soften and efface in preparation for labor, the mucus plug can dislodge in pieces (clear, pink, or slightly bloody). This can happen weeks before labor begins, or very close to it. Losing the mucus plug alone is not a sign that you need to go to the hospital, but contact your provider if you experience heavy bleeding, regular contractions, or your water breaks.
Is it safe to have sex at 35 weeks pregnant?
For most low-risk pregnancies, sex is safe throughout pregnancy including at 35 weeks. Sexual activity does not harm the baby, who is cushioned by amniotic fluid and protected by the cervix. Semen contains prostaglandins that may mildly stimulate uterine contractions, but this is unlikely to trigger labor in a healthy pregnancy. Your provider may advise against sex if you have placenta previa, a history of preterm labor, your water has broken, or other specific risk factors.
Track Your Exact Pregnancy Week
Use our free Pregnancy Week Tracker to find out exactly how far along you are based on your last menstrual period or due date.
Track My Pregnancy →Sources
- ACOG
- WHO Fetal Growth Charts
- Mayo Clinic
Medical disclaimer: This content is for informational purposes only and is not intended as medical advice. Always consult a qualified healthcare provider for guidance specific to your pregnancy.