42 Weeks Pregnant

At a Glance: Week 42

Trimester: Third (post-term). Baby's size: About the size of a small jackfruit — approximately 52–53 cm (20.5–20.9 inches) head-to-heel and weighing around 3,700–4,200 grams (8.2–9.3 pounds), though size varies.

You have officially reached post-term pregnancy. This is uncommon — fewer than 1% of accurately-dated pregnancies extend to 42 weeks. At this stage, the risks of continuing pregnancy begin to outweigh the benefits, and major medical guidelines recommend not allowing pregnancy to continue beyond 42 completed weeks. Your provider will almost certainly schedule an induction this week if labor has not begun.

Your Baby's Development This Week

At 42 weeks, baby is fully developed and continues final maturation. Some changes characteristic of post-term babies:

• Skin: Vernix is essentially gone. Skin may be dry, peeling, or cracked at birth — particularly on hands and feet. This is harmless and improves over the first weeks.
• Hair and nails: Scalp hair may be longer than typical. Fingernails often extend past the fingertips and may need careful trimming after birth.
• Body composition: Some post-term babies are larger than average, while others (those with placental insufficiency) may appear long and thin with reduced fat.
• Meconium: The intestines have been accumulating meconium for weeks. Post-term babies are more likely to pass meconium in utero, which can stain the amniotic fluid and pose a risk of aspiration during birth.
• Brain: Continues rapid development. By 42 weeks, the brain is mature and ready for the sensory experiences of life outside the womb.
• Senses: Hearing, vision, taste, and touch are all functional and ready. Your baby recognizes your voice from inside the womb.
• Placental function: May begin to decline after 41-42 weeks, leading to reduced amniotic fluid and less efficient oxygen and nutrient transfer — the primary reason for recommended induction at this stage.

Your Body and Symptoms This Week

By 42 weeks, you are likely physically and emotionally exhausted. Common symptoms include:

• Intense fatigue: Poor sleep, discomfort, and the emotional weight of waiting all contribute.
• Significant pelvic pressure: Baby is engaged deep in the pelvis.
• Frequent strong Braxton Hicks: Often difficult to distinguish from early labor.
• Cervical changes: Your provider will likely find some softening, effacement, and possibly dilation.
• Bloody show: Common, indicating the cervix is changing.
• Persistent lower back pain: May come in waves resembling contractions.
• Difficulty walking: Pelvic pressure can make movement feel waddling and unstable.
• Edema: Mild swelling in feet and hands is common; significant or sudden swelling needs assessment.
• Mood swings: Frustration, sadness, and impatience often peak now. Some parents describe feeling forgotten or abandoned by their bodies.

Nutrition: What to Eat and Avoid This Week

Maintain a nutrient-dense diet that supports energy and recovery. Eat regularly to keep blood sugar stable, especially in case labor begins.

• Protein: Eggs, lean meats, beans, lentils, yogurt, and tofu support energy and repair.
• Iron: Crucial as birth approaches (and possible blood loss). Pair with vitamin C foods for absorption.
• Calcium and vitamin D: Continue for bone health.
• Complex carbs: Whole grains, oats, sweet potatoes — provide steady energy.
• Healthy fats: Avocado, nuts, olive oil, and safe fatty fish.
• Fiber and fluids: Help with constipation and hemorrhoids, common in late pregnancy.
• Easy snacks: Keep portable foods (granola bars, fruit, peanut butter sandwiches) for during labor or hospital admission.
• Hydration: 2–3 liters of water daily. Dehydration can intensify contractions and cause dizziness.

Continue to avoid: Raw seafood and meats, unpasteurized dairy, high-mercury fish, alcohol, deli meats unless heated, raw eggs, excessive caffeine (limit to 200 mg/day), and untested herbal preparations marketed for "natural induction" — these can be dangerous.

Movement and Exercise

Continue gentle movement as tolerated. At 42 weeks, the focus is comfort and gentle encouragement of labor, not fitness.

• Short walks: Several short walks per day are more sustainable than one long one.
• Birth ball work: Sitting, gentle bouncing, hip circles, and figure-8 movements.
• Pelvic tilts and cat-cow: Relieve back pain and encourage optimal baby positioning.
• Supported squats: Open the pelvis. Hold a sturdy surface for balance.
• Forward-leaning positions: Hands and knees, or leaning over a ball, encourage anterior baby positioning.
• Stair climbing: Going up sideways may help encourage descent.

Avoid: Any high-impact or risky activity, deep backbends, and exhaustion-level workouts. Stop and call your provider for bleeding, fluid leakage, decreased fetal movement, severe headache, chest pain, or persistent dizziness.

Mental and Emotional Wellbeing

Reaching 42 weeks is emotionally difficult. You may feel frustrated, abandoned by your body, terrified of induction, or simply numb. These feelings are valid. Sleep deprivation, hormonal fluctuations, and the weight of waiting all contribute to a fragile emotional state.

Coping strategies that can help include: focused breathing and grounding exercises, gentle distraction with low-effort activities, talking openly with your partner, asking trusted people to handle outside communication for you, scheduling a daily "worry window" where you allow yourself to feel everything and then move on, and remembering that the wait now has an end point — induction is scheduled.

If you notice severe anxiety, panic attacks, hopelessness, or intrusive thoughts, contact your provider promptly. Perinatal mental health is medical care — not a sign of weakness. Many hospitals have perinatal mental health specialists available.

Common Concerns and When to Call Your Doctor

At 42 weeks, monitoring is essential and any concern warrants immediate evaluation. Call your provider or go to the hospital immediately for:

• Any decrease in fetal movement: This is the most critical sign at this stage. Do not wait — call immediately.
• Water breaking: Especially if fluid is green, brown, or has a strong odor (suggests meconium).
• Any vaginal bleeding: More than a small amount of pink mucus.
• Severe headache, vision changes, or upper abdominal pain: Possible preeclampsia.
• Regular contractions: Follow the 5-1-1 rule or your provider's specific guidance.
• Sudden severe swelling: Especially in face or hands.
• Fever or signs of infection.
• Severe persistent abdominal pain: Especially upper right side.
• Loss of consciousness, severe dizziness, or chest pain.

Tests and Appointments This Week

Monitoring is intensive at 42 weeks. Expect:

• Daily or every-other-day non-stress tests (NST): Monitor baby's heart rate and movements.
• Biophysical profile (BPP): Ultrasound assessment of fluid, movement, breathing, and tone.
• Amniotic fluid index (AFI): Low fluid is a common reason to expedite delivery.
• Cervical exam: Determines readiness for induction and what cervical ripening method may be needed.
• Scheduled induction: Almost universally recommended at this stage. Most providers will not continue expectant management past 42 weeks.
• Cesarean planning: May be discussed if induction is contraindicated or baby shows signs of distress.

Tips for Week 42

• Understand your induction plan. Ask your provider exactly what to expect — methods, timing, location, length of stay, pain options.
• Rest aggressively. You'll need energy reserves for labor. Nap when possible, even briefly.
• Eat well before induction. Most hospitals limit eating during active labor — fuel up beforehand.
• Bring comfort items to the hospital. Pillow, robe, slippers, lip balm, snacks for your partner, phone charger, comfort music.
• Lean on your support team. A partner, doula, family member, or close friend can advocate for you and provide comfort during induction and labor.

Preparing for What's Next

Your baby will arrive this week. Now is the time to finalize every detail of the immediate postpartum period. Confirm: pediatrician selected with a first newborn appointment booked within 3-5 days of birth, postpartum supplies ready (heavy maxi pads, peri bottle, sitz bath, comfortable underwear, stool softeners), feeding supplies ready (nursing bras, pads, nipple cream, or bottles and formula), newborn essentials at home (diapers in newborn and size 1, wipes, swaddles, onesies, sleep sacks).

Set clear expectations with family and friends about visitors — it's appropriate to limit visits in the first weeks to focus on recovery and bonding. Confirm postpartum support: who is coming to help, with what, and for how long? Plan for the fourth trimester — those critical first 12 weeks of recovery, feeding establishment, and bonding. Reach out to your provider with any concerns; the next time you see them, you'll likely be holding your baby.

Frequently Asked Questions About Week 42