Sarah thought her morning sickness was over at 14 weeks. But at 37 weeks pregnant, the nausea came rushing back. Sound familiar? You're not alone—and you're not imagining it.
If you're experiencing third trimester nausea, you're among the 15-20% of pregnant women who face this unexpected challenge in late pregnancy. At Mamazing, we understand how frustrating and concerning this can feel when you thought those queasy days were behind you.
This comprehensive guide covers everything you need to know about nausea in third trimester pregnancy, from normal causes to when you should worry, plus evidence-based remedies that actually work.
Is Third Trimester Nausea Normal?
If you're wondering "is third trimester nausea normal?" the answer is yes—it's more common than you might think. While most pregnancy resources focus on first trimester morning sickness, medical research shows that nausea can return or persist throughout pregnancy.
Why Do I Still Have Morning Sickness in Third Trimester
Your body undergoes significant changes in the final months of pregnancy that can trigger return of morning sickness third trimester. Unlike first trimester nausea, which is primarily hormone-driven, third trimester nausea has multiple causes:
- Physical pressure: Your growing baby compresses your stomach and digestive organs
- Hormonal shifts: Rising estrogen levels can irritate your stomach lining
- Slower digestion: Pregnancy hormones continue to slow your digestive system
- Position changes: Your baby's position can affect your comfort levels
Third Trimester Nausea vs First Trimester: Key Differences
| Aspect | First Trimester Nausea | Third Trimester Nausea |
|---|---|---|
| Primary Cause | HCG hormone surge | Physical pressure + estrogen rise |
| Timing | Usually peaks at 9-10 weeks | Can occur anytime after 28 weeks |
| Severity | Often more intense | Usually milder but persistent |
| Associated Symptoms | Food aversions, fatigue | Heartburn, back pain |
| Relief Methods | Time + basic remedies | Position changes + antacids |
Third Trimester Nausea Causes: 9 Medical Reasons Explained
Understanding what causes sudden nausea third trimester pregnancy can help you manage symptoms more effectively. Here are the primary medical reasons behind late pregnancy nausea:
Sudden Nausea Third Trimester Pregnancy - Physical Causes
1. Uterine Pressure on Digestive Organs
As your uterus reaches its maximum size, it pushes against your stomach, diaphragm, and other organs. This physical compression can trigger nausea, especially after eating.
2. Reduced Stomach Capacity
Your growing baby literally takes up space that your stomach once occupied. This means smaller amounts of food can make you feel overly full and nauseous.
3. Changes in Baby's Position
When asking "can the baby's position cause nausea in third trimester?" the answer is absolutely yes. If your baby's head is pressing against your ribcage or stomach, you may experience more severe symptoms.
Return of Morning Sickness Third Trimester - Hormonal Factors
4. Rising Estrogen Levels
While progesterone levels decrease in late pregnancy, estrogen continues to rise. High estrogen can irritate your stomach lining, leading to nausea.
5. Stress Hormones
As your due date approaches, stress and anxiety can trigger the release of hormones that affect your digestive system.
6. Prenatal Vitamin Side Effects
Iron supplements in prenatal vitamins can cause stomach upset, particularly when there's less room in your compressed digestive tract.
Can the Baby's Position Cause Nausea in Third Trimester?
7. Breech Position Effects
Babies in breech position may put additional pressure on your upper abdomen, increasing nausea symptoms.
8. Multiple Pregnancies
If you're carrying twins or triplets, the additional pressure and hormonal changes can intensify third trimester nausea symptoms.
9. Gastroesophageal Reflux (GERD)
Up to 90% of pregnant women develop GERD by their third trimester, which can manifest as nausea along with heartburn.
Third Trimester Nausea at 37 Weeks, 38 Weeks, and Beyond
Experiencing third trimester nausea at 37 weeks or third trimester nausea at 38 weeks often raises concerns about labor approaching. Here's what you need to know about week-specific symptoms:
Third Trimester Nausea at 37 Weeks - What's Happening
At 37 weeks, your baby is considered full-term, and your body begins preparing for labor. Nausea at 37 weeks can signal:
- Your cervix beginning to soften and dilate
- Hormonal shifts preparing your body for delivery
- Increased pressure as your baby drops into position
- Early labor signs (though not always)
Third Trimester Nausea at 38 Weeks - Pre-Labor Signs
Many women notice increased nausea around 38 weeks as their body ramps up for delivery. This nausea at end of pregnancy often comes with:
- Loose stools or diarrhea
- Increased Braxton Hicks contractions
- Nesting instincts
- Changes in appetite
Nausea at End of Pregnancy Sign of Labor
While third trimester nausea can indicate approaching labor, it's not a reliable predictor on its own. True labor signs include:
- Regular, increasing contractions
- Water breaking
- Bloody show or mucus plug loss
- Lower back pain that doesn't subside
Third Trimester Nausea When to Worry: Critical Warning Signs
While most third trimester nausea is harmless, certain symptoms require immediate medical attention. Knowing when to worry can protect both you and your baby.
Third Trimester Nausea Preeclampsia Connection
Preeclampsia affects 3-5% of pregnancies and can be life-threatening if untreated. Sudden onset nausea after 20 weeks can be an early warning sign, especially when combined with:
- High blood pressure (140/90 or higher)
- Protein in urine
- Severe headaches that don't respond to treatment
- Vision changes (blurry vision, seeing spots)
- Upper abdominal pain (especially under right ribs)
- Sudden weight gain (more than 2 pounds per week)
- Swelling in hands and face
Third Trimester Nausea and Headache - Red Flags
The combination of third trimester nausea and headache requires careful monitoring. Call your doctor immediately if you experience:
- Severe headache that doesn't improve with rest
- Nausea accompanied by vomiting more than 3 times per day
- Inability to keep fluids down for 24 hours
- Fever above 100.4°F (38°C)
Severe Third Trimester Nausea Requiring Medical Attention
- Persistent vomiting leading to dehydration
- Weight loss during pregnancy
- Dark, concentrated urine
- Dizziness or fainting
- Rapid heartbeat
- Confusion or irritability
Hyperemesis Gravidarum Third Trimester
While rare in the third trimester, hyperemesis gravidarum can persist throughout pregnancy in some cases. This severe form of pregnancy sickness affects about 0.3-3% of pregnancies and requires medical management.
Third Trimester Nausea Relief: Evidence-Based Solutions
Finding effective third trimester nausea relief often requires a combination approach. Here are proven strategies that can help you feel better:
Natural Remedies for Third Trimester Nausea
Ginger - Nature's Anti-Nausea Powerhouse
Clinical studies show ginger is as effective as vitamin B6 for treating pregnancy nausea. Safe dosage is up to 1 gram (1,000 mg) daily.
Effective ginger forms:
- Fresh ginger tea (1 teaspoon grated ginger in hot water)
- Ginger candies or lozenges
- Ginger ale (choose brands with real ginger)
- Crystallized ginger
Vitamin B6 Third Trimester Nausea Treatment
Vitamin B6 (pyridoxine) is often the first-line treatment recommended by healthcare providers. The standard dose is 25mg three times daily (75mg total), taken with food to prevent stomach upset.
Food sources of vitamin B6:
- Bananas (0.4mg per medium banana)
- Salmon (0.6mg per 3-oz serving)
- Chicken breast (0.5mg per 3-oz serving)
- Avocados (0.3mg per half avocado)
- Sunflower seeds (0.2mg per ounce)
Third Trimester Nausea Medication Safe Options
When natural remedies aren't enough, several medications are considered safe during pregnancy:
| Medication Type | Examples | Safety Rating | Notes |
|---|---|---|---|
| Antacids | Tums, Rolaids | Category A (Safest) | Choose calcium-based options |
| H2 Blockers | Pepcid (famotidine) | Category B | Reduces stomach acid production |
| Antihistamines | Benadryl, Unisom | Category B | Often combined with B6 |
| Prescription | Diclegis, Zofran | Category B/C | For severe cases only |
How to Stop Third Trimester Nausea: Practical Daily Strategies
Managing third trimester nausea all day requires strategic lifestyle modifications. These practical approaches can significantly reduce your symptoms:
Foods That Help Third Trimester Nausea
The right foods can be powerful allies in fighting nausea. Focus on these best foods for third trimester nausea:
The BRATT Diet for Pregnancy:
- Bananas: Easy to digest, rich in potassium
- Rice: Plain white rice settles the stomach
- Applesauce: Provides vitamins without fiber overload
- Toast: Absorbs excess stomach acid
- Tea: Ginger or peppermint varieties
these food also help prevent postpartum gas
Additional nausea-fighting foods:
- Crackers (keep by your bedside)
- Watermelon (hydrating and cooling)
- Popsicles or ice chips
- Lemon water or lemon slices
- Cold foods (less aromatic than hot foods)
Small Meals Third Trimester Nausea Management
With limited stomach space, eating strategy becomes crucial for managing third trimester nausea after eating:
- Eat every 2-3 hours: Never let your stomach get completely empty
- Portion control: Aim for snack-sized portions rather than full meals
- Protein with each meal: Helps stabilize blood sugar
- Avoid drinking with meals: Liquids can make you feel overly full
6 AM: Crackers before getting up
7 AM: Small breakfast (toast with banana)
9:30 AM: Protein snack (Greek yogurt)
12 PM: Light lunch (soup and crackers)
3 PM: Fruit snack (apple slices)
6 PM: Small dinner (rice and chicken)
8:30 PM: Bedtime snack (ginger tea and toast)
Third Trimester Nausea Remedies: Lifestyle Modifications
These practical third trimester nausea remedies can provide significant relief without medication:
Third Trimester Nausea After Eating - Prevention Tips
- Eat slowly: Take 20-30 minutes per meal
- Stay upright: Remain sitting for 30 minutes after eating
- Avoid triggers: Spicy, fatty, or strongly scented foods
- Room temperature foods: Less likely to trigger nausea than hot foods
Third Trimester Nausea at Night Solutions
If you're struggling with third trimester nausea at night, try these sleep-friendly approaches:
- Elevated sleep position: Use 2-3 pillows to keep your head raised
- Left-side sleeping: Improves circulation and reduces pressure
- Empty stomach prevention: Keep crackers on your nightstand
- Fresh air: Keep a window cracked or use a fan
Third Trimester Nausea All Day Management
For persistent, all-day symptoms, consider these comprehensive strategies:
- Aromatherapy: Peppermint or lemon essential oils
- Acupressure: P6 pressure point on your wrist
- Cold therapy: Ice chips or cold washcloths on your neck
- Breathing exercises: Deep, slow breaths through your nose
Third Trimester Nausea Home Remedies: Traditional & Modern
Third Trimester Nausea Diet Plan
A structured third trimester nausea diet plan can make a significant difference in your daily comfort:
Morning Routine:
- Eat crackers before getting out of bed
- Wait 15 minutes before standing
- Start with room-temperature water
- Avoid brushing teeth immediately after eating
Throughout the Day:
- Carry snacks everywhere (crackers, nuts, dried fruit)
- Choose protein-rich options to stabilize blood sugar
- Opt for cold foods when hot food smells are overwhelming
- Stay hydrated with small, frequent sips
Antacids Safe Third Trimester Nausea
When third trimester nausea and heartburn occur together, antacids can provide dual relief:
- Calcium carbonate (Tums): Provides calcium bonus
- Magnesium hydroxide (Maalox): Can help with constipation too
- Timing: Take 1-3 hours after meals and before bed
- Avoid: Sodium bicarbonate products (too much sodium)
Associated Symptoms: Complete Overview
Third Trimester Nausea and Heartburn
The combination of third trimester nausea and heartburn affects up to 60% of women in late pregnancy. This dual discomfort occurs because:
- Stomach acid has less space to stay down
- Progesterone relaxes the esophageal sphincter
- Baby's position can worsen acid reflux
Management strategies:
- Sleep with your head elevated
- Avoid lying down for 2-3 hours after eating
- Choose alkaline foods (oatmeal, bananas, melons)
- Limit citrus and tomato-based foods
Third Trimester Nausea and Diarrhea
When third trimester nausea and diarrhea occur together, dehydration becomes a primary concern:
- Hydration priority: Aim for clear fluids every 15 minutes
- Electrolyte replacement: Try pregnancy-safe sports drinks
- BRAT diet: Bananas, rice, applesauce, toast
- Probiotics: May help restore gut balance
Third Trimester Nausea and Fatigue
The combination of third trimester nausea and fatigue can be overwhelming. Energy-preserving strategies include:
- Prioritize sleep (8-9 hours nightly)
- Take short, frequent naps (20-30 minutes)
- Delegate household tasks
- Focus on nutrient-dense foods when you can eat
Third Trimester Nausea vs Labor Signs: Know the Difference
Third Trimester Nausea vs Preeclampsia Symptoms
Distinguishing between normal third trimester nausea and preeclampsia symptoms can be challenging but crucial:
| Normal Third Trimester Nausea | Preeclampsia Warning Signs |
|---|---|
| Gradual onset | Sudden onset after 20 weeks |
| Responds to food/position changes | Persistent despite interventions |
| No associated headaches | Severe, persistent headaches |
| Normal blood pressure | High blood pressure (≥140/90) |
| No vision changes | Blurry vision, seeing spots |
Can Third Trimester Nausea Be a Sign of Labor?
While nausea can signal approaching labor, it's just one piece of the puzzle. True labor indicators include:
- Regular contractions: Getting stronger and closer together
- Water breaking: Clear or slightly bloody fluid
- Bloody show: Pink or brown mucus discharge
- Lower back pain: Constant, radiating pain
Frequently Asked Questions About Third Trimester Nausea
Is It Normal to Feel Nauseous in Third Trimester?
Yes, experiencing nausea during your third trimester is completely normal. About 15-20% of pregnant women report nausea symptoms in late pregnancy, with only 3% experiencing actual vomiting. This occurs due to physical pressure from your growing baby and hormonal changes preparing your body for delivery.
When Should I Worry About Third Trimester Nausea?
Contact your healthcare provider immediately if your nausea is accompanied by severe headaches, vision changes, upper abdominal pain, sudden swelling, high blood pressure, or if you can't keep fluids down for 24 hours. These could be signs of preeclampsia or other serious conditions requiring medical attention.
Why Am I Suddenly Nauseous at 37 Weeks Pregnant?
Sudden nausea at 37 weeks often occurs because your baby has reached full-term and may be dropping into your pelvis, creating new pressure patterns. Your body is also producing different hormone levels to prepare for labor. This can be a normal pre-labor sign, but monitor for other labor symptoms.
What Helps with Third Trimester Morning Sickness?
Effective relief strategies include eating small, frequent meals every 2-3 hours, using ginger in various forms (tea, candies, fresh), taking vitamin B6 supplements (25mg three times daily), staying hydrated with small sips, and sleeping with your head elevated. Cold foods often work better than hot foods.
Is Nausea at 38 Weeks a Sign of Preeclampsia?
While nausea alone at 38 weeks is usually normal, sudden-onset nausea combined with headaches, vision changes, swelling in hands/face, or upper abdominal pain could indicate preeclampsia. This serious condition affects 3-5% of pregnancies and requires immediate medical evaluation.
Does Third Trimester Nausea Mean Something Is Wrong?
No, third trimester nausea usually doesn't indicate a problem. Most cases are caused by normal pregnancy changes like your baby taking up space and hormonal fluctuations. However, trust your instincts—if something feels "off" or symptoms are severe, always consult your healthcare provider.
Third Trimester Nausea Warning Signs to Never Ignore
- Persistent vomiting (more than 3 times daily)
- Inability to keep fluids down for 24 hours
- Severe headaches that don't improve with rest
- Vision changes (blurriness, seeing spots)
- Upper abdominal pain, especially under right ribs
- Sudden swelling in hands, face, or feet
- High blood pressure readings
- Rapid weight gain (more than 2 pounds per week)
Expert Tips for Managing Third Trimester Discomfort
Position Strategies:
- Sleep on your left side with a pillow between your knees
- Use a pregnancy wedge to support your belly
- Avoid lying flat for 2 hours after eating
- Try the "pregnancy lean" - slight forward tilt when sitting
Stress Management:
- Practice prenatal yoga or gentle stretching
- Use meditation apps designed for pregnancy
- Join online support groups for third trimester experiences
- Communicate openly with your partner about your needs
When to Contact Your Healthcare Provider
- Nausea prevents you from eating or drinking for 24 hours
- You lose weight during pregnancy
- Vomiting occurs more than 3 times per day
- You develop signs of dehydration (dark urine, dizziness, rapid heartbeat)
- Nausea is accompanied by fever, severe headache, or abdominal pain
- You feel something is "not right" - trust your maternal instincts
Looking Ahead: Recovery and Postpartum
The good news about third trimester nausea is that it typically resolves after delivery. Most women notice significant improvement within 24-48 hours of giving birth as hormone levels begin to normalize and physical pressure is relieved.
Postpartum expectations:
- Nausea usually disappears within 1-2 days after delivery
- GERD symptoms typically resolve within weeks
- Some women experience brief nausea during breastfeeding letdown
- Energy levels gradually improve over the first month, though some women may experience postpartum dizziness during recovery
Conclusion: Navigating Third Trimester Nausea with Confidence
Experiencing third trimester nausea can feel frustrating and worrying, especially when you thought morning sickness was behind you. Remember that this affects up to 20% of pregnant women and is usually a normal part of late pregnancy.
The key is knowing the difference between normal third trimester discomfort and warning signs that require medical attention. With the right combination of dietary changes, natural remedies, and medical support when needed, you can manage these symptoms effectively.
At Mamazing, we believe every woman deserves to feel informed and supported during her pregnancy journey. You're almost at the finish line—hang in there, mama. Your body is doing incredible work preparing for your baby's arrival.
Have you found relief from third trimester nausea? Share your experience and help other moms-to-be by commenting below or connecting with our Mamazing community.
