What to Expect at 40 Weeks of Pregnancy: Preparing for Labor and Self-Care

Highlights

• 40 weeks marks full-term pregnancy, ready for natural childbirth.
• Common signs of impending labor: intensified Braxton Hicks contractions, dropped abdomen, weight loss, mucus plug release, amniotic fluid leakage.
• Baby size: 48–51 cm in length, ~3.5 kg in weight.
• Maternal sensations: fatigue, pelvic pressure, frequent urination, mood swings.
• Recommended actions: monitor fetal movements, maintain balanced nutrition, stay active, prepare hospital bag, attend prenatal visits.

Early Signs of Labor

At 40 weeks, labor can begin at any time. Common signs include:

• Increased Braxton Hicks contractions, which may now become stronger and more frequent.
• Dropped abdomen, shifting downward toward the pelvis.
• Slight weight loss (1–2 kg) due to the elimination of excess fluid.
• Mucus plug release several days before or immediately before labor.
• Amniotic fluid leakage or complete rupture of membranes.

Labor is considered full-term from 38 weeks onward, meaning both mother and baby are ready for birth.

Fetal Development at 40 Weeks

• Size: 48–51 cm, ~3.5 kg.
• Age: 38 weeks from conception (embryonic age).
• Lungs: surfactant is fully formed, enabling first breaths.
• Digestive system: processes swallowed amniotic fluid, forming meconium.
• Reflexes: sucking and grasping are fully functional.
• Senses: vision and hearing developed; the baby can distinguish light, color, contrast, and sound.
• Skin: slight bluish tint and wrinkling may appear at birth due to mild hypoxia.
• Genitourinary system: fully formed; in boys, testicles are almost fully descended.
• Skull bones: flexible for passage through the birth canal.

Maternal Sensations and Emotional Changes

• Fatigue and anticipation dominate; physical strain from the large abdomen is significant.
• Evening weakness, leg heaviness, sleepiness, and back pain are common.
• Mood swings: excitement alternates with anxiety about childbirth and readiness.
• Nesting instinct may prompt organizing the home or preparing baby clothes.
• Dropped abdomen may relieve breathing discomfort and improve appetite.
• Increased urination and possible hemorrhoid discomfort require careful attention.

Psychologists advise focusing on positive activities, hobbies, and light errands to manage stress.

Common Discomforts

• Abdominal pain from Braxton Hicks contractions.
• Back and pelvic pain.
• Leg pain from swelling and circulation issues.
• Hemorrhoid discomfort.
• Sacral pain due to nerve compression.

Intensifying or persistent pain should prompt consultation with a healthcare provider.

Vaginal Discharge and Warning Signs

• Slightly increased discharge is common.
• Blood-streaked mucus may indicate mucus plug release.
• Watery or heavily blood-streaked discharge requires immediate hospital visit.
• These signs help determine whether labor is imminent or if a complication, such as placental pathology, exists.

Fetal Movements

• Movements may be less active due to limited space.
• Most fetal activity occurs in upper abdomen (rib area) and when stretching limbs.
• Rhythmic belly vibrations may indicate fetal hiccups.
• Mothers should track at least 10 movements in 12 hours.

Potential Complications

• Fetal hypoxia (oxygen deprivation).
• Infections, such as candidiasis.
• Placental abruption.
• Late-onset preeclampsia (gestosis): nausea, vomiting, high blood pressure, swelling.

Severe complications require prompt medical attention; labor may be induced for maternal and fetal safety.

Fetal Position in the Womb

• Optimal: head-down, longitudinal.
• Malpositions (breech, transverse, oblique) often necessitate Cesarean delivery.
• Small babies or cases without umbilical cord complications may still allow natural delivery.

Abdominal Growth and Stretch Marks

• Fundal height: ~36–40 cm.
• Abdomen is large, often showing visible fetal movements.
• Braxton Hicks contractions occur daily.
• Dropped abdomen reduces heartburn and improves breathing.
• Skin may itch or feel tender; hydration and moisturizing are recommended.
• Large belly requires caution when walking; prefer company for safety.

Nutrition Guidelines

• Balanced diet rich in proteins, vitamins, minerals.
• Include leafy greens, fruits, vegetables, dairy, poultry, and fish.
• Focus on Vitamin K (spinach, broccoli, green onions, dairy, tea, oils) to support blood clotting.
• Avoid alcohol, caffeine, smoked, overly salty or spicy foods.
• Light, frequent meals are recommended for digestive comfort.

Physical Activity Recommendations

• Avoid strenuous exercise at 40 weeks.
• Recommended activities:
  • Long walks in safe areas
  • Breathing exercises
  • Light home workouts
  • Kegel exercises
• Movement helps oxygenate the baby, prepare for labor, and aid postnatal recovery.

Necessary Tests and Examinations

• Weekly prenatal visit should include:
  • Abdominal palpation to determine fetal position
  • Fetal heartbeat monitoring
  • Fundal height and abdominal measurement
  • Blood pressure and weight
  • Urine analysis
  • Additional tests as needed (e.g., cardiotocography to check fetal oxygenation)

Ultrasound Assessment

• Indicated if prior tests or CTG suggest complications.
• Evaluates fetal condition, placental maturity, amniotic fluid volume, and umbilical cord status.
• Helps plan labor and assess safety for mother and baby.

Tips for Expecting Mothers

• Continue regular prenatal visits; monitor for late-stage complications.
• Engage in enjoyable activities to manage stress.
• Prepare baby clothes and hospital bags: one for postpartum, one for discharge.
• Avoid long trips; ensure support is nearby for hospital transfer.
• Maintain adequate rest: 1–2 hours daytime nap, 8–9 hours nighttime sleep.
• Nesting is normal, but avoid heavy tasks or renovations.

Tools and Assistance

• Fetal movement trackers to monitor daily activity.
• Maternity pillows and belts for comfort and support.
• Hospital bag checklist including essentials for mother and baby.
• Breathing and Kegel exercises for labor preparation.
• Professional support: obstetric guidance and emergency contact plan.
• Educational resources: prenatal courses, apps, and informative guides.