A breech baby is positioned bottom-first or feet-first in the uterus instead of the usual head-down position. About 3 to 4 percent of babies are still breech at the end of pregnancy. Breech is actually very common earlier in pregnancy, but most babies turn head-down on their own by 36 to 37 weeks.
Three Types of Breech Position
Not all breech babies are positioned the same way, and the type matters because it affects delivery options and the likelihood of complications.
- Frank breech: The baby’s bottom is closest to the birth canal, with legs folded straight up against the head. This is the most common type.
- Complete breech: Both knees are bent, so the baby is essentially sitting cross-legged with feet and bottom near the birth canal.
- Footling breech: One or both feet dangle below the bottom, pointing toward the birth canal. This type carries the highest risk during vaginal delivery because a foot or leg can slip through the cervix before it’s fully dilated.
Why Some Babies Stay Breech
In many cases, there’s no clear reason. The baby simply doesn’t rotate. But several factors make breech more likely. Having too much or too little amniotic fluid changes how easily the baby can move. A uterus with an unusual shape or fibroids can limit the space available for turning. Placenta previa, where the placenta covers part or all of the cervical opening, can also block the baby from settling head-down.
Pregnancies with twins or more are at higher risk because there’s less room for each baby to maneuver. Premature babies are more often breech simply because they haven’t had enough time to turn. Women who have been pregnant before are slightly more likely to have a breech baby, possibly because the uterine wall is more relaxed, giving the baby more freedom to settle in various positions. Occasionally, certain birth defects prevent the baby from turning.
How Breech Is Detected
Your provider will feel your belly in the third trimester using a hands-on technique called abdominal palpation, pressing gently to identify the baby’s head, back, and bottom. This method catches about 75 percent of breech presentations, which means it misses a meaningful number. One study found that even adding a vaginal exam to the belly check didn’t significantly improve detection.
Because of this gap, some experts have recommended routine ultrasound at 36 weeks for all pregnant women to catch breech presentations that physical exams miss. If your provider suspects breech during an exam, an ultrasound will confirm the position and show exactly which type of breech it is.
Turning a Breech Baby
The most established medical option is a procedure called external cephalic version, or ECV. A provider uses firm, steady pressure on your abdomen to manually guide the baby into a head-down position. It’s typically done around 37 weeks, in a hospital setting where the baby’s heart rate can be monitored throughout. The average success rate is about 58 percent, so it works a little more than half the time.
ECV isn’t safe for everyone. Your provider will rule it out if you have low amniotic fluid, vaginal bleeding, placenta previa, an irregularly shaped uterus, multiples, or certain conditions like high blood pressure or diabetes. An abnormal fetal heart rate also takes it off the table. If you have a medical reason that prevents you from taking medications to stop contractions (which are sometimes given during the procedure), ECV may not be an option either.
Some women try moxibustion, a traditional technique that involves holding a stick of compressed dried herbs near a specific point on the outside of the little toe. The theory is that this stimulates fetal activity and encourages the baby to turn. In one UK study of 76 women, about 41 percent of breech babies turned to head-down after seven days of twice-daily moxibustion sessions at home. Of those women, 88 percent went on to have a vaginal birth. The evidence is still limited, but the technique carries minimal risk and is sometimes offered alongside conventional care.
How Breech Affects Delivery
Most breech babies in the U.S. and UK are delivered by planned cesarean section. The main concern with vaginal breech birth is that the body delivers first while the head, the largest part, comes last. This creates a risk of the head becoming temporarily trapped, which can compress the umbilical cord and cut off the baby’s oxygen supply.
Cord prolapse, where the umbilical cord slips through the cervix ahead of the baby, is also more common in breech deliveries. It occurs in just 0.1 to 0.6 percent of all births, but in breech presentations the rate rises above 1 percent. When the cord comes first, the baby’s body can press against it during delivery, reducing blood flow.
Vaginal breech birth is still possible in certain circumstances, particularly with frank breech, a baby that isn’t too large, and an experienced provider. Some hospitals maintain teams trained in vaginal breech delivery, but availability varies widely. If you’re hoping to avoid a cesarean, the timing of the conversation matters. Discussing ECV and delivery preferences with your provider by 35 to 36 weeks gives you the most options.
Hip Screening After a Breech Birth
Babies born from a breech position have a higher risk of developmental dysplasia of the hip, a condition where the hip joint doesn’t form properly. The sustained breech posture, especially frank breech with legs pressed upward, can affect how the hip socket develops in the womb.
Because of this link, medical guidelines recommend imaging for all breech babies even if their hips seem normal on physical exam. An ultrasound is typically done between 2 and 6 weeks of age. If imaging is delayed, a pelvic X-ray can be used starting at 4 months. Early detection matters because treatment is simplest in the first few months of life, usually involving a soft brace that holds the hips in the correct position while the joint matures. Left undetected, hip dysplasia can lead to problems with walking and joint pain later in childhood.