Quick Answer: Pregnancy insomnia is common, particularly during the third trimester. The lowest-risk relief is non-medicated: left-side sleeping with a body pillow, upper-body elevation to ease heartburn, and a consistent bedtime routine. A 2015 study in Sleep Health (Radwan et al.) found that medium-firm mattresses improved pressure distribution and reduced back pain, both relevant during pregnancy when weight distribution shifts. Always consult your midwife or OB before trying any supplements.
7 min read
You are exhausted. You have been exhausted since the first trimester. And yet, at 2 a.m., you are wide awake watching the ceiling fan spin while the baby practices gymnastics on your bladder.
Pregnancy insomnia is not a personal failing. It is one of the most common complaints we hear at Mattress Miracle when expecting mothers come into our showroom at 441 1/2 West Street in Brantford. You are not imagining it, and you are very far from alone.
Why Pregnancy Causes Insomnia
What the Research Shows
A systematic review conducted by researchers at the Canadian Memorial Chiropractic College and published in the Journal of the Canadian Chiropractic Association found that sleep disturbance affects between 64% and 78% of pregnant women, with rates climbing sharply in the third trimester. The review examined non-pharmacological interventions and found strong evidence for physical and behavioural approaches over medication during pregnancy.
A separate analysis in BMC Pregnancy and Childbirth notes that hormonal, anatomical, and psychological changes during pregnancy create a convergence of factors that disrupt sleep from as early as the first few weeks of conception.
Several forces work against you at once:
- Progesterone surges in the first trimester trigger fatigue but also fragment sleep architecture, meaning you cycle through sleep stages more shallowly and wake more easily.
- Frequent urination begins early and intensifies as the uterus expands and presses on the bladder throughout pregnancy.
- Heartburn and acid reflux (GERD) worsen as the growing uterus pushes the stomach upward, making lying flat uncomfortable, especially after meals.
- Restless legs syndrome (RLS) affects up to 26% of pregnant women, according to the Canadian Sleep Society, with symptoms typically peaking in the third trimester.
- Anxiety about labour, finances, and the new baby reliably surfaces at 3 a.m., when there is nothing else to distract from it.
- Fetal movement, which you spent the first half of pregnancy hoping to feel, becomes a surprisingly effective sleep disruptor later on.
None of this means your body is broken. It means your body is doing something remarkable, and sleep is paying a short-term price.
A Trimester-by-Trimester Look
First Trimester: The Exhaustion Paradox
You feel like you could sleep anywhere, anytime. But nighttime sleep is often restless and shallow. Nausea keeps you awake, or wakes you at 3 a.m. Progesterone is responsible for both the bone-deep fatigue and the fragmented sleep. Most women also begin waking once or twice per night to urinate during this stage.
The relative good news: many women find the second trimester easier. There is often a genuine reprieve before the third trimester arrives with its own challenges.
Second Trimester: Your Best Window
For many women, weeks 14 to 27 bring the best sleep of the entire pregnancy. Morning sickness often eases. Energy returns. The belly is present but not yet the obstacle it will become. In our experience at Mattress Miracle, customers who invest in a good sleep setup during the second trimester tend to find the third trimester far more manageable.
This is also the trimester where left-side sleeping becomes the healthcare-recommended default. A quality body pillow introduced now helps your body adapt to the position before the belly makes it non-negotiable.
Third Trimester: The Hardest Stretch
Between weeks 28 and 40, almost everything conspires against sleep. The baby is large, active, and positioned to put pressure on your bladder, ribs, and sciatic nerve simultaneously. Heartburn tends to peak. Anxiety about the coming birth escalates. Leg cramps strike without warning at 4 a.m.
Research published in the Journal of Clinical Sleep Medicine found that third-trimester sleep quality is independently associated with labour outcomes. Women with severely disrupted sleep had longer labours and higher rates of caesarean deliveries. We mention this not to alarm you, but to underscore that addressing pregnancy insomnia genuinely matters and is worth the effort.
What We See in Our Brantford Showroom
Many of our expecting customers arrive late in pregnancy, ready to invest in anything that promises a more comfortable night. The most common situation: a mattress that was fine before pregnancy but now sags in the middle, leaving the belly with no consistent support through the night. At Mattress Miracle, we have been helping Brantford families sleep better since 1997. Our team at 441 1/2 West Street is happy to walk you through your options in person, with no pressure and no guesswork.
Safe, Non-Medicated Solutions
The consistent guidance from Canadian healthcare providers is clear: avoid sleep medications during pregnancy whenever possible. The following approaches are backed by research and considered safe for most pregnant women. As always, discuss any changes with your OB or midwife.
What Works for Pregnancy Insomnia
- Left-side sleeping with a body pillow: The Society of Obstetricians and Gynaecologists of Canada (SOGC) recommends left-side sleeping after 28 weeks to optimize blood flow through the inferior vena cava. A body pillow behind your back prevents you from rolling onto your back overnight without conscious effort.
- Elevate your upper body for heartburn: A wedge pillow that raises your head and shoulders by 6 to 8 inches reduces the likelihood of stomach acid travelling up the esophagus. It is one of the most effective non-medicated interventions for nighttime GERD during pregnancy.
- Consistent sleep schedule: Going to bed and waking at the same time, including weekends, reinforces your circadian rhythm. Your body begins to anticipate and prepare for sleep when the schedule is reliable.
- Front-load your fluid intake: You still need to stay well hydrated, but drinking most of your fluids before 5 or 6 p.m. can meaningfully reduce middle-of-the-night bathroom trips.
- Cool bedroom temperature: Pregnancy raises your core body temperature. A cooler room, around 16 to 18 degrees Celsius, helps counteract this. Breathable sheets and a lighter duvet make a real difference.
- Gentle daily exercise: Walking, prenatal yoga, or swimming during the day has been shown in multiple studies to improve sleep onset time and sleep quality in pregnant women. Avoid vigorous exercise within three hours of bedtime.
- Mindfulness and slow breathing: A 2019 study in Mindfulness journal found that mindfulness-based interventions significantly reduced insomnia severity in pregnant women compared to controls. Even five minutes of focused breathing at bedtime is a meaningful start.
- Cognitive Behavioural Therapy for Insomnia (CBT-I): Considered the gold standard for insomnia treatment, including during pregnancy. Ask your family doctor about a referral, or look for online CBT-I programs available through provincial health networks.
A Note on Supplements
Many pregnant women ask about melatonin, magnesium, or herbal sleep aids. Health Canada has not established safety guidelines for melatonin use during pregnancy. Most Canadian healthcare providers recommend discussing any supplement with your OB, midwife, or family doctor before use. This article is educational, your healthcare provider is the right person to advise on anything supplement-related during pregnancy.
How Your Sleep Setup Can Help
A supportive mattress and the right pillows will not cure pregnancy insomnia, but they can remove a significant source of the problem: physical discomfort. Here is what makes a real difference.
The Case for a Body Pillow
A full-length body pillow does something a regular pillow cannot: it supports your belly from below, keeps a pillow between your knees to align your hips, and props your back to prevent rolling overnight. Many customers tell us that a body pillow made a bigger difference than any other single change to their sleep setup during pregnancy.
The Symbia 50" Body Pillow is one of the most popular choices we carry at Mattress Miracle. It is long enough to support the belly and knees simultaneously, firm enough to hold its shape through the night, and sized to work on a queen or king mattress without consuming the entire bed.
Wedge Pillows for Heartburn
If GERD is keeping you awake, lying flat is the enemy. A wedge pillow that elevates your upper body by 6 to 8 inches is often the most effective non-medicated intervention for nighttime heartburn during pregnancy. The Symbia Orthopedic Wedge Pillow can be used under the upper portion of your mattress or directly beneath your torso. See our full guide on wedge pillows for acid reflux for details on angles and positioning.
Your Mattress Matters More Than You Think
A sagging mattress compounds every physical discomfort of late pregnancy. If your mattress dips in the middle, your hips and belly have no consistent support regardless of which position you try. A medium-firm mattress provides enough give for hip and shoulder pressure relief while still supporting the lumbar spine. If a new mattress is not in the budget right now, a quality mattress topper can add meaningful support in the short term. Our team at Mattress Miracle can help you identify the right option for your current situation and budget.
Building a Third-Trimester "Sleep Nest"
Several of our customers describe building what they call a sleep nest in the third trimester: a body pillow behind the back, a regular pillow between the knees, a small wedge or folded blanket under the belly for extra lift, and a breathable duvet. It sounds elaborate, but once established it becomes a reliable signal to the body that sleep is coming. Call it a ritual, your body responds to consistency.
When to Talk to Your Doctor
Mild, occasional pregnancy insomnia is very common and generally manageable with the approaches above. Some symptoms do warrant a conversation with your OB, midwife, or family doctor sooner rather than later:
- Severe or uncontrollable leg movements and restlessness at night, which may indicate Restless Legs Syndrome, a condition that can be assessed and managed during pregnancy
- Loud snoring, gasping, or apparent pauses in breathing, which may point to pregnancy-related sleep apnea
- Insomnia severe enough that you are not able to function safely during the day
- Symptoms of prenatal anxiety or depression that worsen at night
Medical Disclaimer
The information in this article is for educational purposes only and does not constitute medical advice. Pregnancy is a health topic where individual circumstances vary considerably. Please consult your OB, midwife, or family physician for guidance specific to your pregnancy, including before using any supplement, device, or therapy for insomnia treatment.
Frequently Asked Questions
Is it normal to have insomnia every night in the third trimester?
Yes, and it is very common. Research suggests 64 to 78% of pregnant women experience significant sleep disruption, with rates highest in the third trimester. While exhausting, it is a normal response to the physical and hormonal demands of late pregnancy. Consistent sleep hygiene, a supportive pillow setup, and left-side sleeping can all help, even when perfect sleep is not achievable.
Can I take melatonin for pregnancy insomnia?
This is a conversation to have with your OB or midwife. Health Canada has not established safety guidelines for melatonin during pregnancy, and most Canadian providers recommend caution with any supplement. Non-medicated approaches, including consistent schedules, body pillow support, and CBT-I, are the first-line recommendation for most pregnant women.
Why does heartburn get worse at night during pregnancy?
When you lie flat, stomach acid can more easily travel up the esophagus. During pregnancy, the growing uterus pushes the stomach upward, and the hormone relaxin loosens the lower esophageal sphincter, making reflux more likely. Smaller meals, avoiding spicy or fatty foods in the evening, and elevating your upper body with a wedge pillow are the most effective non-medicated strategies.
What is the best sleeping position for pregnancy insomnia?
Left-side sleeping is recommended by the Society of Obstetricians and Gynaecologists of Canada after 28 weeks. This position supports blood flow to the placenta and reduces pressure on key blood vessels. A full-length body pillow behind your back and between your knees makes maintaining this position much easier through the night.
Does Mattress Miracle carry body pillows and wedge pillows for pregnancy?
Yes. We carry the Symbia 50" Body Pillow and the Symbia Orthopedic Wedge Pillow, both popular with our expecting customers. You are welcome to try them in person at our showroom at 441 1/2 West Street, Brantford. We are open seven days a week and our team is happy to help. Call (519) 770-0001 to check availability before you come in.
Find Your Perfect Sleep Setup at Mattress Miracle
We are a family-owned mattress store in Brantford, helping our community sleep better since 1997. Come try body pillows, wedge pillows, and supportive mattresses in person and get honest, no-pressure advice.
441 1/2 West Street, Brantford, Ontario
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Related Reading
- Best Pregnancy Pillows in Canada 2026: U-Shape, C-Shape and Wedge Compared
- Pregnancy Sleep Solutions: All-Trimester Comfort Guide
- Wedge Pillows for Acid Reflux: Do They Actually Help?
- Insomnia Guide Canada: Causes, Types and What Actually Works
- Vivid Dreams in Pregnancy: Causes, Meaning and Nightmares