Breech means a baby is positioned feet-first or buttocks-first in the uterus instead of the usual head-down position. It occurs in 3% to 4% of pregnancies at full term. Earlier in pregnancy, breech is far more common: about 25% of babies are breech at 28 weeks, dropping to 7% by 32 weeks as most flip on their own.
Three Types of Breech Position
Not all breech presentations look the same. The type matters because it affects delivery options and risk level.
- Frank breech: The baby’s buttocks point downward, and its legs extend straight up with feet near its face. This is the most common type and generally the most favorable for delivery.
- Complete breech: The baby sits cross-legged, with both hips and knees bent. Think of it as the baby sitting on its own folded legs.
- Footling breech: One or both feet point downward and would come out first during delivery. This type carries the highest risk of complications because a foot or leg can slip through the cervix before it’s fully dilated.
Why Some Babies Stay Breech
Most babies naturally rotate head-down by the third trimester as the uterus grows and the baby’s heavier head settles toward the pelvis. When that doesn’t happen, several factors may play a role. Uterine shape abnormalities, like a septum dividing the uterus, can limit the space available for turning. The location of the placenta matters too: a placenta sitting low in the uterus (placenta previa) can physically block the baby from rotating.
Too much or too little amniotic fluid also affects movement. With excess fluid, the baby has so much room it may keep shifting without settling head-down. With too little, there isn’t enough space to complete the turn. Premature babies are more likely to be breech simply because they haven’t reached the gestational age when most turning happens. Having had multiple pregnancies, carrying twins, or having a baby with certain congenital conditions can also increase the odds.
In many cases, though, there’s no identifiable reason. The baby just hasn’t turned.
How Breech Is Diagnosed
Your provider may suspect a breech position during a routine exam by feeling for the baby’s head and buttocks through your abdomen. A hard, round shape near your ribs (the head) and a softer, irregular shape near your pelvis (the buttocks) suggest breech. Ultrasound confirms it. Most providers check positioning around 35 to 36 weeks, since that’s the window when decisions about turning the baby need to be made.
You might notice clues yourself. Breech babies often kick low in the pelvis rather than up under the ribs, and you may feel a hard lump (the head) pressing against your upper stomach.
Turning a Breech Baby
The primary medical option for turning a breech baby is a procedure called external cephalic version, or ECV. A provider uses firm, guided pressure on your abdomen to manually rotate the baby into a head-down position. It’s typically attempted at or after 37 weeks to ensure the baby would be full term if labor were triggered by the procedure. Some practitioners offer it starting at 36 weeks.
ECV works about 64% of the time overall. Success rates are higher if you’ve had a previous pregnancy, if the baby is in a complete breech or transverse position, if amniotic fluid levels are adequate, and if the placenta is along the back wall of the uterus. First-time mothers, those with a higher BMI, and those carrying a smaller baby tend to have lower success rates. The procedure is always done in a setting where a cesarean can be performed quickly, just in case complications arise.
A large meta-analysis found that successful ECV reduces the likelihood of cesarean delivery by 43%, with no significant increase in maternal or fetal complications.
Non-Medical Approaches
Some people try complementary methods before or alongside ECV. Moxibustion, a traditional Chinese medicine technique that applies heat near a specific acupuncture point on the little toe, has the most research behind it. A meta-analysis of 16 trials found that moxibustion increased the chance of the baby turning head-down by about 39% compared to no treatment, with roughly 1 in 5 to 7 additional babies turning who otherwise wouldn’t have. The effect was strongest in Asian populations and more modest in non-Asian groups. Acupuncture alone showed less consistent results.
Postural exercises, like spending time on hands and knees or elevating the hips, are widely discussed but lack strong clinical evidence. They’re generally considered harmless, and some providers suggest them as a low-risk option to try.
Delivery Options for Breech Babies
Most breech babies in the United States and many other countries are delivered by planned cesarean. This became standard practice after a major international trial (the Term Breech Trial) found that planned cesarean reduced the combined rate of newborn death and serious complications compared to planned vaginal delivery.
A later large observational study from France and Belgium found no difference in combined death or complication rates between the two approaches when strict selection criteria and experienced providers were involved. However, both studies agreed on one thing: babies delivered vaginally in breech position had higher rates of low Apgar scores, the need for breathing assistance at birth, and birth trauma.
The American College of Obstetricians and Gynecologists takes a nuanced position. Planned vaginal breech delivery may be reasonable under hospital-specific guidelines, with an experienced provider, and with the patient’s informed consent. But ECV should be offered first as the preferred alternative for anyone who wants a vaginal birth. The decision ultimately depends on the type of breech, the hospital’s protocols, the provider’s experience, and the patient’s preferences.
Risks Specific to Breech Delivery
The main concern with vaginal breech birth is that the baby’s body delivers before the head, and the head is the largest part. If the cervix isn’t fully dilated, the head can become trapped, which is an emergency. This risk is highest with footling breech, where a small foot can slip through a cervix that isn’t yet wide enough for the rest of the body.
Cord prolapse, where the umbilical cord drops through the cervix ahead of the baby, is another risk. In head-down deliveries, the incidence of cord prolapse ranges from 0.1% to 0.6%. In breech presentations, it’s slightly higher than 1%. Cord prolapse is dangerous because pressure on the cord can cut off the baby’s blood and oxygen supply, requiring immediate delivery.
These risks are the core reason why cesarean delivery became the default for breech babies. When a cesarean is planned, these specific complications are largely avoided.
What Happens if Your Baby Is Breech
If your baby is still breech at 35 to 36 weeks, your provider will likely discuss a plan. The typical sequence is to first determine whether you’re a candidate for ECV, attempt it around 37 weeks if appropriate, and schedule a cesarean if the baby doesn’t turn or if ECV isn’t an option. Many babies who are breech at 34 or 35 weeks still turn on their own before the ECV window, so an early finding doesn’t necessarily mean intervention will be needed.
If ECV is successful, labor and delivery proceed as they would for any head-down baby. If it’s not, a cesarean is usually scheduled around 39 weeks. In some cases, people go into labor before the scheduled date, and a breech baby discovered in active labor typically results in a cesarean unless the provider is experienced in vaginal breech delivery and conditions are favorable.