Most yoga poses are safe during pregnancy, but several categories of poses carry real risks as your body changes. The main ones to avoid or modify include belly-down poses, deep backbends, closed twists, full inversions, and any pose that has you lying flat on your back after about 20 weeks. Here’s a closer look at each category and why it matters.
Why Pregnancy Changes What’s Safe
Your body produces a hormone called relaxin during pregnancy that loosens your muscles, joints, and ligaments to help your body stretch and prepare for delivery. The downside is that this extra flexibility makes you more susceptible to sprains, overstretching, and joint instability. Your pelvis, back, and abdomen are especially affected, which is why many pregnant women feel unsteady on their feet even during familiar movements.
This shifting center of gravity, combined with loosened joints, is the reason so many yoga modifications exist for pregnancy. Poses that were perfectly fine before can now strain vulnerable joints or compress a growing belly in ways that restrict blood flow to the uterus. The American College of Obstetricians and Gynecologists confirms that exercise during uncomplicated pregnancies is safe and beneficial, but the type and intensity of movement matters more as each trimester progresses.
Belly-Down Poses
After the first trimester, any pose that puts pressure on your stomach should come off the list. That includes cobra, locust, and bow pose. These aren’t just uncomfortable with a growing belly; they compress the space your baby needs and put unnecessary pressure on the uterus. If you practiced vinyasa-style flows before pregnancy, you’ll also want to rethink chaturanga into upward-facing dog. This transition is generally fine early on, but as your belly grows, the weight of your stomach pulls your pelvis down, and the deep stretch of upward-facing dog can overextend your abdominal muscles. A simple swap: transition straight from plank into downward dog instead.
Deep Backbends
Wheel pose and other major backbends carry a specific risk after the first trimester. They overstretch the abdominal muscles, which are already under strain as they separate to accommodate your growing uterus. This separation (called diastasis recti) is a normal part of pregnancy for many women, but forceful stretching of the abdominals can make it worse. Gentle chest-opening poses like supported bridge or reclined butterfly with a bolster give you the benefits of opening the front body without the strain.
Closed Twists vs. Open Twists
Not all twists are off-limits, but the distinction between closed and open twists matters. A closed twist is one where you rotate your torso toward or across a bent leg, compressing your belly. Think of revolved chair pose, revolved triangle, or seated spinal twists like lord of the fishes pose. These squeeze the baby’s space, can strain abdominal muscles that are already compromised, and restrict blood flow to the uterus. There’s also the risk of destabilizing the sacroiliac joint, which is already more vulnerable due to relaxin.
Open twists, where you rotate away from the bent leg so your belly stays open, are a different story. Gentle open twists that focus on mobilizing the upper spine without compressing the lower abdomen are generally safe and even beneficial during the second and third trimesters. The key is keeping your belly free and avoiding any forceful rotation.
Full Inversions
Headstands, handstands, and shoulderstands are best avoided, particularly during the first and third trimesters. The primary concern is falling. Your center of gravity shifts significantly as your belly grows, making balance unpredictable even if you had a rock-solid inversion practice before pregnancy. A fall from an inverted pose carries serious risks. Even gentler inversions like happy baby pose (where your head drops below your heart) are worth discussing with your provider before practicing.
If you miss the feeling of inversions, legs up the wall is a safer alternative that still gives you the calming, circulation-boosting benefits without the fall risk.
Lying Flat on Your Back
After about 20 weeks, lying flat on your back (the supine position) can compress a major blood vessel called the vena cava. This vessel returns blood from your lower body to your heart, and when the weight of your uterus presses on it, blood flow drops. You might feel dizzy, lightheaded, or short of breath. This means savasana, reclined bound angle, and any supine pose needs modification. Lying on your left side or propping your upper body at an angle with bolsters keeps pressure off the vena cava while still letting you rest.
Crunches and Core Compression
Boat pose, bicycle crunches, and any exercise that involves curling the torso toward the legs should be avoided. These movements compress the baby’s space and put intense pressure on abdominal muscles that are already stretching and separating. Core strength still matters during pregnancy, but the focus should shift to stabilizing exercises like cat-cow, bird-dog, and pelvic floor work rather than anything that creates a crunching motion.
Hot Yoga
This one is straightforward: skip it entirely. Research has shown that a core body temperature above 102°F, or an increase of more than 3°F from your resting temperature, can result in abnormal fetal development. Hot yoga classes typically run around 95 to 105°F with high humidity, making it very easy to overshoot that threshold. Even if you feel fine, your core temperature can climb faster than you realize in a heated room. A regular-temperature class gives you all the same benefits without the risk.
Forward Folds and Stance Adjustments
Standing forward folds with your feet together become impractical and potentially unsafe as your belly grows. There simply isn’t room, and the compressed position can make you dizzy or throw off your balance. The fix is easy: widen your stance before folding so your belly has space to hang freely between your legs. This applies to seated forward folds too. Spread your legs into a wide V rather than folding over closed legs.
Signs to Stop Immediately
Regardless of which poses you’re practicing, certain signals mean you should stop your session right away. Dizziness, sudden shortness of breath, back or pelvic pain, vaginal bleeding, or contractions are all reasons to pause and get checked out. Pregnancy loosens the usual feedback your body gives you about overstretching, so a pose that feels fine in the moment can still cause strain. If something feels off, trust that instinct over any instructor’s cue to push deeper.
What Stays Safe
The list of what to avoid can feel long, but most yoga remains accessible throughout pregnancy with minor modifications. Walking lunges, warrior poses, wide-legged standing poses, cat-cow, gentle hip openers, and supported restorative poses are all well-suited to a changing body. The ACOG lists stretching exercises and moderate physical activity as safe and beneficial, and notes that concerns about exercise causing miscarriage, poor fetal growth, or premature delivery have not been substantiated for uncomplicated pregnancies.
A prenatal yoga class is the simplest way to practice safely, since the sequences are already built around these modifications. If you prefer a regular class, let your instructor know you’re pregnant and keep this list of poses in mind. The goal isn’t to stop moving. It’s to move in ways that support both your body and your baby’s development as things shift week to week.