A birthing chair is a specially designed seat that supports a woman in an upright or semi-upright position during labor and delivery. Unlike the flat hospital bed most people picture when they think of childbirth, a birthing chair uses gravity and natural body positioning to assist the baby’s descent through the birth canal. These chairs have been used in various forms for thousands of years, fell out of favor when hospital births became standard, and have made a steady comeback as evidence mounts that upright birthing positions offer real physiological advantages.
How a Birthing Chair Is Designed
Modern birthing chairs look nothing like a standard hospital bed. They typically feature a contoured seat with an opening at the front or center, allowing the birth attendant access while the mother remains seated. The seat is shaped to support the pelvis, and most models include an adjustable sloping backrest so the mother can recline slightly during contractions or sit more upright during pushing. Foot supports, handholds or upper body grips, and head rests round out the design, giving the laboring woman something to brace against while bearing down.
Some birthing chairs are low to the ground, resembling a stool with a U-shaped or crescent-shaped seat. These simpler versions are often called birth stools. Others are full chairs with multiple adjustment points that can shift the mother between sitting, semi-reclined, and near-squatting positions. The key design principle across all of them is the same: keep the mother’s pelvis free and mobile rather than pinned flat against a mattress.
A Tool With Ancient Roots
Birthing chairs are not a modern invention. Evidence of their use appears in ancient Egyptian papyri and references in the Old Testament, making them one of the oldest known pieces of medical equipment. For most of human history, women delivered in some form of upright, supported position, often attended by female midwives.
Early modern versions introduced design refinements like a sloping back that let the mother recline slightly between contractions. But as male physicians gradually took over the birth process from midwives, the birthing chair was largely abandoned in favor of the flat bed. Lying down was more convenient for the attendant managing the delivery, even though it offered no advantage to the mother. The shift had more to do with who controlled the birth room than with medical evidence. Today, the World Health Organization recommends encouraging women to adopt the birth position of their individual choice, including upright positions, whether or not they have epidural analgesia.
Why Upright Positions Help During Labor
The advantage of a birthing chair comes down to basic physics and anatomy. When you sit upright or in a supported squat, gravity works with your contractions instead of against them. Your body weight presses downward on the uterus, helping push the baby toward the birth canal rather than requiring your muscles to do all the work horizontally.
The pelvic changes are measurable. Research using MRI imaging has shown that moving from a flat-on-your-back position to an upright squat increases the width of the mid-pelvis and pelvic outlet by 0.9 to 1.9 centimeters, a 7 to 15 percent expansion. In pregnant women, the widest internal measurement of the pelvis jumped from 12.6 cm while lying flat to 14.5 cm in a squatting position. That extra space may not sound like much, but when a baby’s head is navigating a tight passage, even a centimeter matters. Hip flexion in an upright or squatting posture also changes the angle of the baby’s descent, creating a straighter path through the pelvis and pelvic floor.
Birthing Chair vs. Deep Squatting
If upright positioning is the goal, you might wonder why a chair is needed at all. The answer is endurance. A deep squat offers excellent pelvic opening and gravity assistance, but it places intense pressure on the knees and lower back. Maintaining that position during the bearing-down phase of labor, which can last well over an hour, is extremely difficult for most women. Fatigue sets in quickly, and an exhausted mother has less energy for effective pushing.
A birthing chair solves this by transferring the mother’s weight to the seat and backrest while still keeping the pelvis in a flexed, gravity-assisted position. The low height of many birth stools bends the legs in a way that mimics squatting without requiring the mother to support her own body weight. Handholds and foot supports give her something to push against, turning each contraction into a more efficient effort. It is, in effect, a sustained squat with built-in rest.
Impact on Labor Duration
A large meta-analysis pooling data from multiple studies found that upright positions, including sitting on a birthing chair or stool, shortened the second stage of labor (the pushing phase) by an average of about 21 minutes compared to lying flat. Individual studies within that analysis reported reductions ranging from roughly 3 minutes to over 34 minutes, reflecting wide variation depending on the specific position, the mother’s history, and other factors. Twenty minutes may not sound dramatic, but in a phase of labor that is physically intense and emotionally exhausting, it represents a meaningful difference in energy expenditure and stamina.
Risks and Trade-Offs
Birthing chairs are not without downsides. The most consistently reported concern is an increased risk of genital tract tears. A large cohort study comparing over 1,100 births on a birth seat to more than 9,400 births in other positions found that women using the seat were more likely to sustain labial tears requiring stitches. First-time mothers on a birth seat were actually less likely to receive an episiotomy (a surgical cut), but they were more likely to experience third- or fourth-degree perineal tears, the most severe kind. Women who had previously delivered by cesarean section and were attempting a vaginal birth showed an elevated risk of serious tears as well.
Blood loss is another consideration. Semi-sitting and sitting positions have been associated with higher average blood loss and a greater chance of losing more than 500 ml. However, when researchers looked more closely, they found that the increased bleeding was linked specifically to perineal damage. Among women whose perineum remained intact, sitting positions carried no additional blood loss risk. In other words, the bleeding issue appears to stem from the tears themselves rather than from the position.
These risks don’t mean birthing chairs are dangerous. They mean the choice involves trade-offs: a potentially shorter, more comfortable labor on one hand, with a somewhat higher chance of soft tissue injury on the other. The severity and likelihood of tears vary based on factors like whether it is a first birth, the baby’s size, and how the birth is managed by the attendant.
Who Uses Birthing Chairs Today
Birthing chairs and stools are most commonly found in birth centers, midwifery-led units, and hospitals that emphasize physiologic (low-intervention) birth. Some labor and delivery rooms in conventional hospitals stock them as an option alongside standard beds. They are used most often by women having uncomplicated, low-risk pregnancies who want to labor without an epidural, since full mobility makes it easier to take advantage of the chair’s design. That said, the WHO’s guidelines recommend offering upright position options even to women with epidural analgesia, and some facilities use modified birthing chairs or adjustable beds that can approximate a seated position for women with limited lower-body sensation.
If you are interested in using a birthing chair, it is worth asking your birth facility what equipment they have available and whether their staff is experienced in supporting upright deliveries. The chair itself is only part of the equation. Having a birth team comfortable with managing delivery in that position makes a significant difference in both safety and experience.