Best Mattress for Pregnancy in Canada (2026 Guide)

Pregnancy transforms sleep in ways that most expectant parents do not anticipate until they are lying awake at 2 a.m., unable to find a comfortable position. A meta-analysis published in Sleep Medicine Reviews found that 45.7% of pregnant women experience clinically poor sleep quality (a PSQI score above 5), with sleep quality declining significantly between the second and third trimesters. In a study of more than 7,000 pregnant women, 77% reported sleep problems. These are not just comfort issues: research published in Sleep has linked poor maternal sleep to increased risks of pre-eclampsia, gestational diabetes, preterm birth, and cesarean delivery.

Your mattress cannot solve every pregnancy sleep challenge. Hormonal changes, frequent urination, fetal movement, and anxiety all contribute to disrupted sleep. But the mattress is the one factor in your sleep environment that you can optimize to directly address the physical discomforts that account for the majority of pregnancy sleep complaints: back pain, hip pain, pelvic girdle pain, and the inability to find a comfortable position as your body changes shape.

How Pregnancy Changes Your Sleep

Understanding the specific physical changes that affect sleep during pregnancy helps explain why your pre-pregnancy mattress may no longer work.

Weight distribution shifts: The average pregnancy weight gain of 25-35 lbs (Health Canada recommendation) is concentrated in the abdomen, breasts, and fluid retention. This shifts your centre of gravity forward, changes the load your mattress must support, and alters the spinal alignment your mattress must maintain. A mattress that kept your spine neutral at 140 lbs may not do so at 175 lbs with a fundamentally different weight distribution.

Ligament laxity: The hormone relaxin, which increases throughout pregnancy and peaks in the third trimester, loosens the ligaments of the pelvis to prepare for delivery. While the direct link between relaxin levels and pelvic pain severity is debated in the research literature, the increased mobility of pelvic joints means that proper support during sleep becomes more critical. Without adequate mattress support, the pelvis can shift out of alignment during the night, contributing to sacroiliac joint pain and symphysis pubis dysfunction.

Increased body temperature: Basal metabolic rate increases by approximately 20% during pregnancy, generating more body heat. Blood volume increases by 40-50%, and cardiac output rises, both of which contribute to feeling warmer. Many pregnant women who never experienced hot sleeping before find themselves overheating nightly, especially in the second and third trimesters.

Respiratory changes: The growing uterus pushes the diaphragm upward by approximately 4 cm, reducing lung capacity and making it more difficult to breathe comfortably in certain positions. Nasal congestion (pregnancy rhinitis) affects up to 30% of pregnant women and worsens in the supine position. Both of these changes make back sleeping uncomfortable and reinforce the importance of side sleeping.

Trimester-by-Trimester Mattress Needs

8 min read

Side Sleeping: Why It Matters and How Your Mattress Helps

The Society of Obstetricians and Gynaecologists of Canada (SOGC) recommends side sleeping during pregnancy, particularly in the second and third trimesters. Left-side sleeping is traditionally favoured because it optimizes blood flow through the inferior vena cava to the placenta, though recent research suggests that both left and right side sleeping are safe.

Side sleeping places concentrated pressure on two points: the shoulder and the hip. During pregnancy, this pressure is amplified because the additional weight increases the force at these contact points, and hormonal changes make the joints more sensitive to sustained compression. The result is a common pregnancy complaint: waking with numb, aching hips and shoulders that force you to switch sides repeatedly throughout the night.

A mattress that supports pregnancy side sleeping must do two things simultaneously:

Allow the shoulder and hip to sink in: The shoulder and hip need to compress into the comfort layer enough that the spine remains straight from the neck through the pelvis. If the mattress is too firm, these bony prominences bear excessive pressure, causing numbness and pain that wakes you up. This typically requires at least 2-3 inches of conforming comfort material (memory foam, latex, or micro-coils) above the support core.

Support the midsection: Unlike non-pregnant side sleeping, where the midsection is relatively lightweight, pregnant side sleeping involves a heavy abdomen suspended between the supported shoulder and hip. Without support, the abdomen hangs unsupported, pulling the lumbar spine into lateral flexion and causing or worsening lower back pain. A mattress with moderate firmness (not too soft) prevents this by providing enough upward support under the belly area to minimize spinal curvature. A pregnancy pillow placed under the belly can supplement this support.

Back Pain, Hip Pain, and Pelvic Girdle Pain

Approximately 50% of pregnant women experience significant back pain or pelvic girdle pain during pregnancy, and these conditions are among the primary causes of pregnancy-related sleep disturbance. The mattress plays a critical role in either worsening or alleviating these conditions during the 7-9 hours spent in bed each night.

Lower back pain: Pregnancy back pain is typically caused by the forward shift in the centre of gravity, increased lumbar lordosis (lower back curve), and ligamentous laxity in the pelvic joints. A mattress that maintains neutral spinal alignment during side sleeping, meaning no lateral curvature of the spine, reduces the cumulative stress on the lower back structures during sleep. The Kovacs et al. (2003) Lancet trial, while not specific to pregnancy, established that medium-firm mattresses produce better back pain outcomes than firm mattresses for chronic low back pain.

Hip pain: Hip pain during pregnancy has multiple contributors: the weight of the baby pressing on hip structures during side sleeping, increased joint laxity from relaxin, and changes in gait that alter how hip muscles are loaded during the day. For sleep, the critical factor is reducing interface pressure at the greater trochanter (the bony prominence on the outside of the hip). Memory foam and latex conform to the hip contour and distribute this pressure more broadly, reducing the peak pressure that causes pain and numbness.

Pelvic girdle pain: Pelvic girdle pain, including sacroiliac joint dysfunction and symphysis pubis dysfunction, is worsened by asymmetric positioning. During side sleeping, the upper leg can pull the pelvis out of alignment if it is not properly supported. Placing a firm pillow between the knees keeps the pelvis in a neutral, symmetrical position and significantly reduces night-time pelvic pain. The mattress contributes by providing a stable, non-shifting surface that does not allow the pelvis to rotate during sleep.

Temperature Regulation During Pregnancy

Overheating is one of the most disruptive sleep issues during pregnancy, particularly in the second and third trimesters. The increased metabolic rate, expanded blood volume, and hormonal changes create a "furnace effect" that standard bedding and mattresses are not designed to handle.

For pregnancy sleep, prioritize these cooling features:

Pocketed coil support core: A coil-based mattress allows air to circulate through the support layer, providing continuous passive cooling that all-foam mattresses cannot match. This is the single most impactful cooling feature for pregnant hot sleepers.

Gel-infused or open-cell comfort layers: Modified memory foam or natural latex comfort layers dissipate heat more effectively than traditional closed-cell memory foam while still providing the pressure relief pregnant side sleepers need.

Natural fibre covers: Wool, cotton, or TENCEL covers wick moisture away from the skin and promote evaporative cooling. This is particularly important during pregnancy, as night sweats become more common in the third trimester.

What to Look for in a Pregnancy Mattress

When evaluating mattresses for pregnancy, prioritize these specific characteristics:

Medium to medium-firm feel (5-6.5/10): Pregnant women generally need a slightly softer surface than non-pregnant sleepers of the same weight because they are forced into side sleeping, which requires more pressure relief at the hip and shoulder. However, the mattress must be firm enough to prevent the midsection from sinking excessively, which causes spinal misalignment.

Responsive materials: Pregnancy requires frequent position changes during the night. Slow-responding memory foam can make repositioning difficult, especially as mobility decreases in the third trimester. Responsive materials like latex, pocketed micro-coils, or high-resilience polyfoam allow easier movement and position changes.

Edge support: Getting in and out of bed becomes progressively more difficult as pregnancy advances. Strong edge support allows you to sit on the edge of the bed safely and use it as leverage for standing up. Foam-encased perimeters or reinforced edge coils prevent the edge from collapsing under concentrated body weight.

Low off-gassing: Pregnant women are often more sensitive to smells due to heightened olfactory sensitivity. New mattresses, particularly those with synthetic foams, can release volatile organic compounds (VOCs) for several days to weeks. Look for CertiPUR-US certified foams (low VOC emissions) or natural materials like latex and wool. If purchasing a new foam mattress, allow it to off-gas in a well-ventilated room for 3-7 days before sleeping on it.

Mattress height: A mattress that is too low makes getting up difficult when mobility is limited. Standard bed height (including base and mattress) of approximately 25 inches allows most pregnant women to sit on the edge with feet flat on the floor and stand up without excessive strain.

Thinking Long-Term: A Mattress for the Whole Family

Our Brantford Showroom Recommendations

Restonic ComfortCare (from $1,619): With 1,222 individually pocketed coils and multi-layer comfort, the ComfortCare provides the pressure relief pregnant side sleepers need at the hip and shoulder while maintaining spinal alignment through the midsection. The coil system offers excellent breathability for temperature regulation and responsive support that adapts to your changing body through each trimester. Our best value for expectant parents.

Restonic Luxury Silk & Wool (from $2,395): The natural silk and wool comfort layers make this our top recommendation for pregnant women dealing with overheating. Wool is a natural temperature regulator that keeps you cool when warm and warm when cool, and its moisture-wicking properties manage night sweats effectively. The 884 pocketed coils provide responsive support, and the natural materials minimize off-gassing concerns.

Restonic Revive Tiffany Rose (from $2,995): For pregnant women with significant hip or back pain, the Tiffany Rose's gel memory foam comfort layers provide the deepest pressure relief in our lineup. The 1,188 pocketed coils maintain strong support while the gel-infused foam conforms to the hip and shoulder contours, reducing the pressure-point pain that causes frequent awakenings. The gel infusion also helps manage pregnancy-related overheating.

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