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Third Trimester Symptoms Guide

The final stretch of pregnancy brings unique challenges and excitement. Understanding third trimester symptoms helps you prepare for labor and know what to expect.

Third Trimester Overview (Weeks 28-40+)

The third trimester is marked by rapid fetal growth and preparation for birth. As your baby gains weight and space becomes limited, you'll experience new physical challenges alongside the excitement of meeting your baby soon.

28-32
Early Third Trimester
33-36
Pre-Term Preparation
37-40+
Full Term & Beyond

Symptoms by Pregnancy Stage

Weeks 28-32

Early Third Trimester

Your growing baby is putting pressure on your diaphragm and other organs. This is when many women start feeling the physical challenges of late pregnancy.

Key Changes:

  • Shortness of breath increases
  • Heartburn intensifies
  • Braxton Hicks contractions begin
  • Trouble sleeping starts
  • Frequent urination returns

Helpful Tips:

  • Sleep with extra pillows for support
  • Eat smaller, more frequent meals
  • Practice breathing exercises
  • Stay hydrated but limit fluids before bed
Weeks 33-36

Mid Third Trimester

Baby is gaining weight rapidly and running out of room. You may feel every movement more intensely and experience new discomforts.

Key Changes:

  • Increased pelvic pressure
  • More difficulty finding comfortable positions
  • Possible leaking of colostrum
  • Nesting instinct may begin
  • Joint achiness and back pain

Helpful Tips:

  • Try prenatal massage for aches
  • Prepare nursery and baby items
  • Practice relaxation techniques
  • Consider a pregnancy support belt
Weeks 37-40+

Full Term & Beyond

Your body is preparing for labor. Baby is considered full-term and could arrive any day. Watch for signs of true labor versus false labor.

Key Changes:

  • Lightning (baby dropping)
  • Mucus plug may be lost
  • More intense Braxton Hicks
  • Burst of energy or extreme fatigue
  • Possible water breaking

Helpful Tips:

  • Have hospital bag ready
  • Know signs of real labor
  • Try natural methods to encourage labor if overdue
  • Rest when possible to conserve energy

Managing Common Third Trimester Symptoms

Shortness of Breath

Baby pressing against diaphragm

Relief Strategies:

  • Sleep propped up
  • Practice deep breathing
  • Avoid overexertion
  • Fresh air walks

Trouble Sleeping

Physical discomfort and frequent urination

Relief Strategies:

  • Pregnancy pillow
  • Warm bath before bed
  • Relaxation techniques
  • Limit screen time

Heartburn

Stomach compressed by growing uterus

Relief Strategies:

  • Small frequent meals
  • Avoid spicy/acidic foods
  • Don't lie down after eating
  • Antacids (doctor approved)

Swelling (Edema)

Increased blood volume and pressure

Relief Strategies:

  • Elevate feet
  • Wear compression socks
  • Stay hydrated
  • Reduce sodium intake

Back Pain

Weight gain and posture changes

Relief Strategies:

  • Prenatal yoga
  • Warm compress
  • Proper posture
  • Supportive shoes

Braxton Hicks Contractions

Uterus practicing for labor

Relief Strategies:

  • Change positions
  • Stay hydrated
  • Take warm bath
  • Practice breathing

Recognizing Signs of Labor

1

Regular Contractions

Contractions that get stronger, longer, and closer together over time

Timing: Every 5 minutes for 1 hour
What to do: Time contractions and head to hospital when 5-1-1 (5 min apart, 1 min long, for 1 hour)
2

Water Breaking

Rupture of amniotic sac causing fluid to leak or gush

Timing: Can happen gradually or suddenly
What to do: Contact healthcare provider immediately, even without contractions
3

Bloody Show

Mucus plug mixed with blood as cervix begins to dilate

Timing: Can occur days to weeks before labor
What to do: Normal sign but contact provider if bleeding is heavy
4

Consistent Lower Back Pain

Persistent back pain that doesn't improve with position changes

Timing: May come in waves with contractions
What to do: Monitor for other labor signs and contact provider

When to Contact Your Healthcare Provider

Call immediately if you experience any of these symptoms:

Severe headaches or vision changes
Sudden decrease in baby's movement
Heavy vaginal bleeding
Severe abdominal pain
Signs of preeclampsia (severe swelling, high blood pressure)
Persistent fever over 100.4°F
Painful urination or signs of infection
Severe shortness of breath or chest pain
Regular contractions before 37 weeks
Sudden gush of fluid (possible water breaking)

Preparing for Baby's Arrival

Physical Preparation

  • Pack hospital bag by 36 weeks
  • Install and check car seat
  • Prepare nursery essentials
  • Practice breathing and relaxation techniques

Practical Preparation

  • Finalize birth plan and preferences
  • Plan route to hospital/birth center
  • Arrange childcare for other children
  • Prepare meals for after birth

Track Your Third Trimester Journey

Monitor your symptoms, track baby's movements, and stay prepared for labor with our comprehensive pregnancy tracker.

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