A breech birth occurs when a baby is delivered buttocks- or feet-first instead of head-first, affecting about 3–4% of full-term pregnancies.
Most pregnant women picture labor starting with a head-down baby — and around 96% of the time, that’s exactly what happens. But for the remaining 3 to 4 percent of term pregnancies, the baby settles with its buttocks, feet, or both pointed toward the birth canal. That orientation changes nearly everything about delivery planning.
The question “what is breech birth” gets at more than just a flipped position. It involves understanding how babies lie in the uterus, why some don’t turn head-first on their own, and which delivery routes make sense once a breech presentation is confirmed past 36 weeks.
What Exactly Is Breech Birth?
Breech birth is the medical term for a delivery where the baby’s lower body — the buttocks, feet, or both — exits the pelvis first rather than the head. Obstetricians call this a longitudinal lie with the fetal breech presenting, meaning the baby is aligned vertically in the womb but upside down relative to the typical head-first (cephalic) position.
In early pregnancy, breech presentation is actually the norm. About 25% of babies are in a breech position before 28 weeks. By 36 weeks, most have flipped spontaneously into a head-down stance. If a baby remains breech after that point, healthcare providers begin discussing options for turning or delivering.
Breech presentation isn’t a condition or a deformity — it’s a positioning pattern. The baby’s body may be perfectly healthy; the concern is how that position affects the mechanics of labor and the safety of vaginal delivery.
Why Some Babies Stay Breech
Many women wonder whether they did something to cause a breech baby or whether something is wrong with the pregnancy. In most cases, the answer to both questions is no. Breech presentation happens for anatomical or physiological reasons that are largely outside your control.
Factors that can increase the likelihood of a breech baby include:
- Prematurity: The earlier a baby is born, the more likely it is to be breech. Preterm babies haven’t had as much time to turn head-down.
- Multiple gestations: With twins or more, there’s less room for each baby to position head-down, making breech presentation more common.
- Uterine shape or fibroids: An abnormally shaped uterus, uterine fibroids, or structural anomalies can limit the baby’s ability to flip.
- Amniotic fluid volume: Too much fluid (polyhydramnios) allows excessive movement; too little fluid restricts it. Both can keep the baby in a breech position.
- Placental location: Placenta previa (a low-lying placenta covering the cervix) can block the baby from settling head-down in the pelvis.
None of these factors reflect anything you did or didn’t do during pregnancy. They are mostly structural or timing-related conditions that your provider monitors through routine ultrasounds.
Options for Turning or Delivering a Breech Baby
Once a breech baby is confirmed at or after 36 weeks, most obstetricians move toward active management rather than waiting. The first option discussed is often external cephalic version (ECV) — a procedure where the doctor applies firm, steady pressure on your abdomen to manually turn the baby into a head-down position. Cleveland Clinic notes that most babies who are still breech after 36 weeks will need a conversation about turning or delivery — see its breech baby 36 weeks page for a full walkthrough.
ECV is typically performed near a delivery unit so that an emergency C-section is available if needed. It succeeds roughly 50–60% of the time, though success depends on how much amniotic fluid is present, the mother’s body type, and whether the baby’s buttocks have already settled into the pelvis. When ECV works, the baby often stays head-down for the remainder of the pregnancy.
| Delivery Option | How It Works | Typical Timing |
|---|---|---|
| External cephalic version (ECV) | Doctor turns the baby manually through the abdomen | 36–37 weeks, near a delivery unit |
| Planned C-section | Surgical delivery through an abdominal incision | 39 weeks (or earlier if labor starts) |
| Vaginal breech birth (select cases) | Baby delivered vaginally with specialized provider assistance | Only at hospitals with experienced staff and strict criteria |
| Spontaneous version (waiting) | Baby turns on its own after 36 weeks | Uncommon after 37 weeks |
| Maternal positioning exercises | Certain postures may encourage baby to turn | No strong evidence; some women try 34–36 weeks |
Choosing the right approach depends on the type of breech, your health history, the hospital’s capabilities, and the provider’s experience. Not every option is available at every birth center.
The Three Types of Breech Presentation
Not all breech babies sit the same way. The specific type matters a great deal when evaluating delivery risk. Here are the three recognized forms, from most common to least:
- Frank breech: The baby’s buttocks present first, with both legs flexed at the hips and extended straight up toward the head (feet near the face). This is the most common type and carries the lowest risk among breech positions because the legs help keep the cord from slipping down.
- Complete breech: The baby’s buttocks present first, but the knees are bent so the baby appears to be sitting cross-legged. This position leaves slightly more room for the umbilical cord to descend.
- Footling breech: One or both feet extend downward below the buttocks, so a foot or feet would emerge first during delivery. This type carries the highest risk of cord prolapse (when the umbilical cord slips into the birth canal ahead of the baby).
The type is typically confirmed by ultrasound. Frank breech accounts for the majority of term breech presentations and is the one most compatible with a planned vaginal breech delivery under strict hospital protocols.
What Happens During a Breech Delivery
If ECV doesn’t work or isn’t an option, most providers recommend a planned cesarean section. The main concern with vaginal breech delivery is that the baby’s head — the widest part — comes last, which increases the risk of the umbilical cord being compressed before the head is delivered. That compression can reduce oxygen flow, a situation known as birth asphyxia.
Breech delivery also requires specialized maneuvers from the attending provider. The doctor must support the baby’s body without pulling too firmly, guide the arms across the chest, and maintain the head in a flexed position as it passes through the pelvis. Per the ACOG patient FAQ on breech versus head-first positioning, cesarean is the delivery route most often chosen when a baby is breech at term because of these mechanical risks.
| Breech Position Type | Key Characteristic |
|---|---|
| Frank breech | Buttocks first, legs straight up toward head (most common) |
| Complete breech | Buttocks first, knees bent, sitting cross-legged |
| Footling breech | One or both feet present first (highest cord prolapse risk) |
There is also a known association between breech presentation and hip dysplasia — a condition where the baby’s hip joint doesn’t develop fully. The connection likely stems from the limited space in the womb rather than from the birth itself. Most hospitals will screen a breech-born baby’s hips with ultrasound in the first few months.
The Bottom Line
Breech birth simply means your baby is positioned to come out buttocks- or feet-first rather than head-first. The vast majority of breech babies are healthy, and most hospitals have clear protocols — ECV, planned C-section, or in limited cases a vaginal breech delivery — to manage the situation safely. The key is knowing your baby’s position by 36 weeks so you have time to weigh options.
Your obstetrician or midwife can help you choose the turning method or delivery route that fits your specific breech type, your health profile, and your hospital’s resources — no two breech pregnancies are identical, and the right call depends on your full picture.
References & Sources
- Cleveland Clinic. “Breech Baby” Most fetuses turn into a headfirst position by 36 weeks; if a baby is still breech after 36 weeks, healthcare providers typically discuss options for turning or delivery.
- ACOG. “If Your Baby Is Breech” In a breech presentation, the baby’s buttocks, feet, or both are positioned to come out first during birth, rather than the head (cephalic presentation).