What Is a Birthing Ball? Benefits for Labor and Pregnancy

A birthing ball is a large, inflatable rubber ball, typically 55 to 75 cm in diameter, that pregnant people sit on, lean against, or rock on during pregnancy and labor. It is physically identical to the exercise balls found in gyms and physical therapy clinics, but it takes on the name “birthing ball” when used in a maternity context. The concept dates back to the early 1980s, when childbirth educators Penny Simkin and Paulina Perez adapted the physiotherapy ball for use during labor, recognizing that upright, mobile positions on the ball could reduce pain and encourage fetal descent. Since then, a growing body of research has linked birthing ball use to shorter labor, lower pain scores, and reduced cesarean rates, making it one of the more well-studied non-drug comfort measures in modern obstetrics.

How a Birthing Ball Works During Pregnancy

For many people, the birthing ball becomes useful well before labor starts. Low back pain is one of the most common complaints in the second and third trimesters, and sitting on a ball engages core stabilizing muscles in a way that a chair or couch does not. The gentle instability of the ball encourages subtle shifts in posture and pelvic tilt that can take pressure off the lower spine.

A controlled study of pregnant women who followed a stability ball exercise program found that participants reported significantly less low back pain and less interference with daily activities by 36 weeks of gestation compared to women who did not use the ball.¹ Another trial looking specifically at third-trimester back pain found that average pain intensity dropped from about 5.2 out of 10 before ball exercises to roughly 1.8 afterward.² That is a meaningful drop on a pain scale, enough to shift from moderate discomfort to something close to minimal.

Beyond pain relief, sitting on the ball during pregnancy can encourage optimal fetal positioning. When you sit upright with your knees slightly lower than your hips, gravity nudges the baby into an anterior position, with the heaviest part of the baby’s head settling toward the front of the pelvis. This is widely considered the ideal alignment for a smoother labor, though the evidence for this particular benefit is more observational than experimental.³

Reducing Labor Pain Without Medication

Pain management is where birthing balls have attracted the most research attention, and the results are fairly consistent. The idea is straightforward: sitting on the ball allows you to sway, rock, bounce, and rotate your hips, all of which are forms of active movement that distract from pain, release tension in the pelvic floor, and promote endorphin release. The ball also lets you adopt an upright position comfortably, which tends to reduce the pressure of contractions on the lower back compared to lying flat.

A systematic review and meta-analysis of randomized controlled trials found that women who used a birthing ball during labor experienced pain scores roughly 1.7 points lower on a standard 0-to-10 pain scale compared to control groups.⁴ A separate randomized trial measured the effect at specific time intervals and found that active pelvic movements on the ball reduced pain by about 2 points at 30, 60, and 90 minutes.⁵ A more recent updated meta-analysis confirmed the direction of these findings, reporting that pain scores at 4 cm and 8 cm dilation were roughly 20 percent lower in the birthing ball group.⁶

To be clear, a 1.5-to-2-point reduction on a 10-point pain scale is not going to make labor painless. No one should expect a birthing ball to replace an epidural if that is what they need. But for someone looking to manage early and active labor with fewer interventions, or for someone waiting for an epidural to be placed, the ball can make contractions more bearable during a critical window.

A broader systematic review noted that the potential mechanisms include decreased perineal pressure when sitting upright on the ball, rhythmic movement that activates the body’s own pain-gating pathways, and the psychological benefit of feeling in control of your body during labor.⁷

Shorter Labor and Faster Cervical Dilation

Perhaps the most striking finding across studies is that birthing ball use appears to shorten the first stage of labor. A systematic review and meta-analysis found that women who used a birth ball experienced an active labor phase that was about 112 minutes shorter than controls.⁸ A later updated meta-analysis reported an even larger reduction of over two hours in the first stage of labor.⁶

One trial focused on first-time mothers found that the average total labor duration was about 14.4 hours in the birthing ball group compared to about 19.2 hours in the control group, a difference of nearly five hours. The same study found that cervical dilation progressed faster, and the use of labor augmentation drugs and analgesics was lower in the ball group.⁹ A randomized controlled trial published in Archives of Gynecology and Obstetrics similarly found that both the active phase of labor and the pushing stage were significantly shorter for women who used a birth ball.¹⁰

Why would sitting on a ball speed things up? Biomechanics research offers some clues. When you sit on a birthing ball, your pelvis is free to move in all directions. Squatting positions, which you can approximate by leaning forward over a ball, produce high levels of hip flexion, abduction, and external rotation, all of which open the pelvic outlet and create more room for the baby to descend.¹¹ By contrast, lying flat on a bed restricts pelvic mobility and narrows the available space. The ball essentially lets gravity and movement do some of the mechanical work that would otherwise depend entirely on uterine contractions pushing against a less favorable geometry.

Cesarean Rates and Mode of Delivery

Lower cesarean rates are one of the most debated outcomes in birthing ball research, but the pooled evidence points in a positive direction. The updated meta-analysis of randomized controlled trials found that the birthing ball group had significantly lower cesarean section rates, with roughly 45 percent lower odds of a cesarean compared to control groups. However, the same analysis found no significant difference in rates of instrumental delivery (forceps or vacuum), amniotomy, labor induction, or epidural use.⁶

That last point is worth sitting with. The ball does not seem to affect every downstream intervention equally. It appears to help the most with the core mechanics of labor progression, specifically getting through the first stage faster and with less pain, which then reduces the likelihood that labor stalls out and ends in an unplanned cesarean. But it does not seem to change whether clinicians choose to break the water, start an oxytocin drip, or offer an epidural. In practical terms, this means a birthing ball works alongside medical interventions rather than as an alternative to them.

The Peanut Ball, a Close Relative

If you have heard of a “peanut ball,” it is worth understanding how it differs from a standard round birthing ball. A peanut ball is shaped like a large peanut shell, narrower in the middle and bulging at each end. The shape keeps it from rolling away, which makes it ideal for use in bed, particularly for people who have had an epidural and cannot sit upright safely on a round ball.

You typically place the peanut ball between your legs while lying on your side. This keeps the hips open and the pelvis in a favorable position even while resting flat. A meta-analysis of peanut ball studies found that women with epidural analgesia who used a peanut ball shortened their first stage of labor by about 53 minutes compared to controls.¹² A randomized clinical trial found an even larger effect, reporting nearly three hours less total labor time, along with reduced maternal fatigue and anxiety. In that trial, peanut ball positioning also increased the rate of vaginal birth.¹³

An earlier study found that peanut ball users had roughly 59 percent lower odds of cesarean delivery compared to the control group, and the second stage of labor was about 11 minutes shorter.¹⁴ These are promising results, and many labor and delivery units now stock peanut balls alongside round ones. If your birth plan includes an epidural but you still want the pelvic-opening benefits of a ball, the peanut ball is the practical option.

Sizing and How to Use It

The standard birthing ball size used in most clinical research is 65 cm in diameter, which fits a wide range of body heights. Generally, when you sit on a properly sized ball, your hips should be level with or slightly higher than your knees, and your feet should rest flat on the floor. Taller people may need a 75 cm ball, while someone shorter might be more comfortable on a 55 cm ball. Most hospitals that provide birthing balls have multiple sizes available.

There is no single “correct” way to use a birthing ball. Common positions include:

Sitting and rocking: Sit on the ball with your feet shoulder-width apart and gently rock your hips side to side, front to back, or in circles. This is the most common labor position and helps open the pelvis during contractions.
Leaning forward: Kneel on the floor or bed and drape your upper body over the ball. This position takes weight off the lower back and lets the baby hang forward, which can relieve back labor.
Bouncing gently: Light bouncing can help the baby’s head press on the cervix, which may encourage dilation. The bouncing also provides rhythmic distraction from contraction pain.
Standing lean: Place the ball against a wall at about chest height and lean into it while standing. This lets you sway your hips while staying upright.

According to a systematic review, a woman can sit on the ball and rock or slightly bounce to reduce perineal pressure, or lean over the ball to allow the baby to hang downward, reducing back pain and back labor.⁷ In clinical trials, sessions typically range from 20 to 60 minutes of ball use during active labor, though there is no hard rule about duration. The main guidance is to use it as long as it feels helpful and to stop if you feel unsteady.

Perineal Tears and Episiotomy

Whether birthing balls reduce tearing or the need for episiotomy is a question with more mixed answers. One trial of a birth ball abdominal core training program found that the episiotomy rate in the training group was about 15 percent compared to 25 percent in the control group.¹⁵ A separate study found that counterpressure techniques combined with a birthing ball were effective in reducing perineal ruptures.¹⁶

However, a scoping review noted that at least one randomized trial found no statistically significant difference in episiotomy rates between a Swiss ball exercise group and a control group, with rates of roughly 71 percent and 80 percent respectively.¹⁷ Those numbers likely reflect settings where episiotomy is still routinely practiced; in hospitals where the procedure is done selectively, the baseline rates would be much lower. The honest assessment is that birthing balls may contribute to less perineal trauma, but the evidence is inconsistent enough that you should not rely on the ball alone for this outcome. Perineal massage, warm compresses, and a provider’s technique during delivery all play larger roles in preventing severe tears.

Safety Considerations

Birthing balls have a reassuringly low risk profile. Across the clinical trials reviewed in multiple systematic reviews and meta-analyses, none reported serious adverse events associated with ball use. The balls used in hospitals are typically burst-resistant, meaning they deflate slowly if punctured rather than popping suddenly. That said, common-sense precautions apply:

Stable surface: Use the ball on a non-slip floor, not on tile or hardwood where it can slide. A yoga mat underneath helps.
Spotter available: During active labor, when contractions can come on suddenly, having a partner or nurse nearby to steady you prevents falls.
Proper inflation: An under-inflated ball can be too soft to provide good support, and an over-inflated ball feels unstable. Most come with a guideline for how much to inflate.
Medical clearance: If you have a high-risk pregnancy, placenta previa, or are on bed rest for any reason, check with your provider before using a ball.

There are no widely cited contraindications specific to birthing ball use in otherwise healthy pregnancies. Most hospitals and birth centers now include them as standard comfort equipment, and many prenatal classes teach ball exercises as part of labor preparation.

Postpartum Uses

The birthing ball does not become useless after delivery. Many parents discover it is surprisingly helpful in the postpartum period, both for infant soothing and for physical recovery.

Sitting on the ball and gently bouncing is a go-to technique for calming a fussy newborn. The rhythmic motion mimics the movement the baby experienced in the womb, and the bouncing happens to be easier on a sore postpartum body than pacing the hallway. For people recovering from a vaginal delivery, sitting on the ball can also be more comfortable than a hard chair, since the ball distributes pressure more evenly across the perineum.

On the rehabilitation side, there is emerging evidence that the ball can support pelvic floor recovery. A randomized controlled trial comparing active birth ball training to passive biofeedback therapy for pelvic floor rehabilitation found that the birth ball group showed greater improvements in pelvic floor muscle strength and lower recurrence of urinary incontinence after three months. While this particular study focused on post-hysterectomy patients rather than postpartum women specifically, the underlying principle, that dynamic exercises on the ball engage and strengthen the pelvic floor muscles, applies to postpartum recovery as well.¹⁸

What a Birthing Ball Cannot Do

It is easy to read the research and come away thinking the birthing ball is a miracle device. Worth noting what the evidence does not support. One meta-analysis found that while pain and labor duration improved, other outcomes showed no significant differences between groups, and the overall level of evidence for secondary outcomes was low to very low.¹⁹ The updated meta-analysis reinforced this, finding no significant effect on second-stage labor duration, instrumental delivery rates, or the use of oxytocin and epidurals.⁶

A birthing ball will not guarantee a shorter pushing stage. It will not prevent the need for medical intervention if the baby is in distress or labor is not progressing for clinical reasons unrelated to positioning. It will not eliminate the need for pain medication for people who want or need it. And it will not change the course of a labor that requires a cesarean for safety reasons like cord prolapse or placental abruption.

What it can do is give you a tool that makes the hours of early and active labor more manageable, that may help your body do the mechanical work of opening the pelvis more efficiently, and that reduces the statistical likelihood of some interventions. For something that costs less than most hospital parking fees and carries essentially no risk, that is a reasonable return.

Where the Research Still Has Gaps

Most birthing ball studies have been conducted on first-time mothers giving birth vaginally at term with a single baby in a head-down position. That means the findings may not generalize neatly to people expecting multiples, those with babies in breech presentation, or those with a prior cesarean attempting a vaginal birth. Research on ball use during induction specifically, rather than spontaneous labor, is thin. And very few studies have measured long-term outcomes like postpartum pain, breastfeeding success, or pelvic floor function beyond the immediate delivery period.

There is also a blinding problem that runs through all this research. You cannot give someone a placebo birthing ball. Participants know whether they are in the ball group or the control group, which means expectations and the psychological comfort of doing something active during labor could account for part of the benefit. That does not mean the ball does not work, but it does mean the measured effects may include both the physical mechanics and the mental benefit of having agency during a process that can feel overwhelmingly passive. Honestly, for most people in labor, a tool that makes you feel more in control is doing something valuable regardless of the precise breakdown between physical and psychological effect.

1
PubMed. Effects of a stability ball exercise programme on low back pain and daily life interference during pregnancy
2
Jurnal Ilmiah Kebidanan (The Journal Of Midwifery). Effectiveness of Video-Guided Birth Ball Exercises on Reducing Back Pain in the Third Trimester of Pregnancy
3
THE JOURNAL OF Mother and Child Health Concerns. Effectiveness of optimising fetal positioning and birthing ball on the incidence of perineal tears in labouring mothers
4
PubMed. Birthing ball for reducing labor pain: a systematic review and meta-analysis of randomized controlled trials
5
PubMed. Active pelvic movements on a Swiss ball reduced labour duration, pain, fatigue and anxiety in parturient women: a randomised trial
6
PubMed Central. Efficacy of birthing ball exercises to reduce labor pain and cesarean rates: an updated meta-analysis of randomized controlled trials
7
PubMed Central. Effectiveness of Birthing Ball Exercises Therapy in Improving Labor Pain and Labor Outcomes: A Systematic Review
8
Journal of Midwifery and Reproductive Health. The Impact of Birth Ball Exercises on Mode of Delivery and Length of Labor: A Systematic Review and Meta-Analysis
9
PubMed Central. The Effect of Birthing Ball Exercises on Labor Pain and Labor Outcome Among Primigravidae Parturient Mothers at a Tertiary Care Hospital
10
PubMed. The effect of birth ball exercise on labor pain, delivery duration, birth comfort, and birth satisfaction: a randomized controlled study
11
PubMed Central. Biomechanical assessment of upright birthing positions using marker-based and markerless motion capture systems
12
PubMed Central. Investigation of the effects of peanut ball during labor: An updated systematic review and meta-analysis
13
PubMed Central. Effectiveness of a physical therapy program using peanut ball positions during the first stage of labor on maternal and neonatal outcomes: randomized clinical trial
14
PubMed Central. Reducing Length of Labor and Cesarean Surgery Rate Using a Peanut Ball for Women Laboring With an Epidural
15
PubMed. Effect of birth ball abdominal core training on pregnancy fatigue, waist pain and delivery outcomes
16
Poltekita : Jurnal Ilmu Kesehatan. The Effect of Counter Pressure and Birthball on The Time of The First Stage of Labor and Prevention of Perineal Rupture
17
Rev. Gaúcha Enferm.. Pelvic-joint and muscle mobility exercises in preparing for childbirth: a scoping review
18
PubMed. Rehabilitation of pelvic floor muscle for women with urinary incontinence post hysterectomy: A randomized controlled trial
19
PubMed. Birth ball use for women in labor: A systematic review and meta-analysis