A birthing ball won’t trigger labor the way medical induction does, but specific movements on the ball can help your baby descend into your pelvis, encourage a favorable position, and open up the pelvic space in ways that may help labor start on its own. Many midwives and OBs recommend ball exercises in the final weeks of pregnancy for exactly this reason. Here’s how to use one effectively.
Why a Birthing Ball Can Help Labor Progress
The core idea is simple: sitting upright on an unstable surface keeps your pelvis mobile and your hips open. When you’re upright and shifting your weight frequently, the pelvis widens and deepens, giving your baby’s head more room to move down. That downward pressure from the baby’s head on your cervix is one of the signals that can encourage dilation and, potentially, the onset of labor.
The ball also encourages your baby to rotate. Babies need to navigate through the pelvis in a specific orientation, and frequent position changes help them find the right path. If your baby is in a posterior position (facing your belly instead of your spine), the rocking and tilting movements on a ball can encourage rotation to the more favorable anterior position, which is associated with smoother labor onset and progression.
Choosing the Right Ball
A birthing ball is essentially an exercise ball, but you want one rated for the job. Look for a ball with an anti-burst valve, which means it deflates slowly rather than popping if punctured. Size matters: when you sit on the properly inflated ball, your hips should be higher than your knees. For most people, that means a 65 cm ball if you’re between 5’4″ and 5’10”, a 55 cm ball if you’re shorter, or a 75 cm ball if you’re taller. Place it on a non-slip surface like carpet or a yoga mat, and keep shoes or grippy socks on.
Exercises to Encourage Labor
Hip Circles
Sit on the center of the ball with your feet flat on the floor, slightly wider than hip-width apart. Slowly rotate your hips in large circles, as if you’re stirring a pot with your pelvis. Do 10 circles in one direction, then switch. This movement opens the pelvic outlet and helps guide the baby’s head downward. It also relieves lower back pressure, which becomes increasingly useful as your due date approaches.
Figure-Eight Movements
From the same seated position, trace a figure-eight pattern with your hips. This combines side-to-side and front-to-back motion, which relieves lower back pain and helps move the baby’s head down into the pelvic area. The movement is gentle, and you control the size and speed. Start small and let the motion feel natural before making it bigger.
Gentle Bouncing
Light, rhythmic bouncing on the ball uses gravity to encourage your baby to drop lower into the pelvis. You’re not launching yourself off the ball. Think of it as a subtle pulse, keeping your feet planted and your core gently engaged. The repetitive downward motion applies mild pressure to the cervix, which may help it soften and thin. Many people find this the easiest movement to sustain for longer periods, especially while watching TV or sitting at a desk.
Pelvic Tilts
While seated on the ball, rock your pelvis forward and backward. When you tilt forward, your belly drops slightly and your lower back arches gently. When you tilt back, your tailbone tucks under. This rocking loosens the muscles and ligaments around your pelvis and can help a baby who is sitting high settle deeper. It’s also one of the best movements for relieving the aching lower back that comes with late pregnancy.
Leaning Forward
Kneel on the floor and drape your upper body over the ball, hugging it with your arms. This position takes weight off your back, opens the front of the pelvis, and uses gravity to encourage the baby into an anterior position. It’s especially useful if you’ve been told your baby is posterior or hasn’t engaged yet. You can gently sway your hips side to side or rock forward and back while in this position.
How Long and How Often
There’s no strict protocol, but consistency matters more than marathon sessions. Aim for 15 to 30 minutes at a time, several times a day, starting around 32 to 34 weeks. Some people simply replace their desk chair or couch seat with the ball for portions of the day. The more time you spend in upright, mobile positions rather than reclined on a sofa, the more opportunity your baby has to settle into a good position.
In the final days before your due date, you can increase the frequency and duration if it feels comfortable. Many people use the ball for an hour or more at a stretch without issues. Listen to your body. If you feel dizzy, off-balance, or experience any sharp pain, stop and rest.
What the Research Actually Shows
The honest picture is that evidence for birthing balls specifically triggering labor is limited. No large clinical trial has shown that ball exercises reliably cause labor to start in someone whose body isn’t already moving in that direction. What the research does support is that ball use during labor itself can be beneficial. A systematic review published in the American Journal of Obstetrics and Gynecology found that using a peanut-shaped ball (a variation of the birthing ball) during labor was associated with a first stage of labor that was about 87 minutes shorter on average, and an 11% higher likelihood of vaginal delivery compared to standard care without a ball.
The takeaway: a birthing ball is unlikely to force labor to begin, but the positioning and movement it encourages can create the best possible conditions for labor to start naturally. Once labor does begin, the ball remains a useful tool throughout.
Staying Safe on the Ball
The biggest practical risk is simply falling off. Your center of gravity shifts significantly in late pregnancy, and balance can feel unreliable. Have a wall, sturdy piece of furniture, or your partner nearby, especially the first few times. Make sure the ball is inflated firmly enough that you don’t sink into it. Your thighs should slope slightly downward from hip to knee when seated.
Avoid using the ball on slippery floors like tile or hardwood without a mat underneath. If you’ve been put on bed rest or told to limit activity for any pregnancy complication, check with your provider before using one. For uncomplicated pregnancies, birthing balls are considered very low-risk, which is why they’re a staple in labor and delivery units and birthing centers worldwide.