Frank breech is the most common type of breech presentation, where a baby is positioned buttocks-first in the uterus with both legs extended straight up toward the head, almost like a pike position. The baby’s feet are near its face rather than tucked beneath it. About 3 to 4 percent of full-term pregnancies involve a breech presentation, and frank breech accounts for roughly 65 to 70 percent of those cases.
How Frank Breech Differs From Other Breech Types
Not all breech positions are the same. In a frank breech, the baby’s hips are flexed and the knees are straight, so the legs point upward along the torso. This creates a compact shape where the buttocks sit lowest in the pelvis. It’s the most “organized” breech position and generally considered the least complicated of the three types.
In a complete breech, the baby sits cross-legged with both hips and knees bent, almost like sitting in a chair. The feet are tucked near the buttocks. In a footling (or incomplete) breech, one or both feet dangle below the buttocks, meaning a foot would emerge first during delivery. Footling breech carries the highest risk of complications like umbilical cord prolapse, where the cord slips ahead of the baby and gets compressed during delivery.
Why Babies End Up in Frank Breech
Most babies naturally rotate to a head-down position between 32 and 36 weeks of pregnancy. When that rotation doesn’t happen, several factors may play a role. First-time pregnancies and pregnancies with low amniotic fluid levels can limit the space a baby has to turn. An unusually shaped uterus, uterine fibroids, or a placenta that sits low (placenta previa) can physically block the baby from flipping. Premature babies are more likely to be breech simply because they haven’t yet reached the gestational age when most babies turn on their own.
In many cases, though, there’s no identifiable reason. The baby just doesn’t make the turn. If your provider identifies a breech presentation before 36 weeks, there’s still a reasonable chance the baby will rotate spontaneously. After 36 to 37 weeks, spontaneous turning becomes less likely because the baby is running out of room.
How Frank Breech Is Detected
Your provider may suspect a breech presentation during a routine prenatal exam. When feeling the abdomen, a hard round shape (the head) near the top of the uterus instead of the bottom is a strong clue. You might also notice kicks concentrated low in your pelvis rather than up near your ribs, or feel a firm, round lump pressing against your ribcage.
An ultrasound confirms the diagnosis and identifies the specific type of breech. Most providers will check fetal position around 35 to 36 weeks to allow time for intervention if needed.
Turning a Breech Baby
The standard medical approach for turning a breech baby is called an external cephalic version (ECV). A provider uses their hands on the outside of the abdomen to manually guide the baby into a head-down position. ECV is typically attempted around 36 to 37 weeks, when the baby is mature enough for delivery if any complications arise but there’s still enough amniotic fluid to allow movement.
Success rates for ECV vary, but overall about 50 to 60 percent of attempts successfully rotate the baby. Frank breech babies can sometimes be slightly harder to turn than complete breech babies because those extended legs act like a splint along the body, making the baby less flexible. The procedure can be uncomfortable, involving significant pressure on the abdomen, and is done under monitoring so the baby’s heart rate can be tracked throughout. Some providers administer medication to temporarily relax the uterus, which can improve success rates.
If ECV fails or isn’t recommended due to factors like low amniotic fluid, certain placenta positions, or a history of uterine surgery, delivery planning moves to either a planned cesarean or, in select circumstances, a vaginal breech delivery.
Delivery Options for Frank Breech
A planned cesarean section is the most common delivery method for breech babies in many countries. A large international trial published in The Lancet in 2000 (the Term Breech Trial) found that planned cesarean delivery significantly reduced the risk of serious complications and newborn death compared to planned vaginal breech birth. That study shifted obstetric practice worldwide, and cesarean became the default recommendation for breech presentations.
However, the conversation around vaginal breech birth has evolved since then. Frank breech is considered the safest breech position for vaginal delivery because the baby’s compact shape means the buttocks create a consistent “wedge” that dilates the cervix progressively, and the extended legs reduce the chance of a foot or the umbilical cord slipping through ahead of the body. Some experienced providers and birth centers do offer planned vaginal breech delivery for frank breech babies when strict criteria are met: the baby is an appropriate estimated size, the pregnancy is full-term, labor progresses normally, and an experienced practitioner is present.
Finding a provider skilled in vaginal breech delivery can be difficult. As cesarean became standard practice over the past two decades, fewer obstetricians trained in breech vaginal techniques, creating a gap in available expertise. If vaginal breech birth is important to you, it’s worth asking early whether your hospital or provider has that experience.
Risks Specific to Frank Breech
The primary concern with any breech delivery is something called head entrapment, where the baby’s body delivers but the head, the largest part, gets caught at the cervix. This is less common in frank breech than in footling breech because the buttocks do a better job of gradually stretching the cervix before the head follows. Still, the risk exists and is one reason continuous monitoring during a vaginal breech birth is essential.
Cord prolapse, where the umbilical cord drops into the birth canal ahead of the baby and gets compressed, is another concern with breech births in general. Frank breech has the lowest cord prolapse rate among breech types, around 0.5 percent, compared to 15 to 18 percent for footling breech. The baby’s buttocks fit snugly against the lower uterus, leaving little room for the cord to slip past.
Babies who remain in frank breech position for extended periods in late pregnancy can sometimes develop temporary hip issues. The extended-leg posture puts the hip joints in an unusual position, and providers will often screen frank breech babies for developmental dysplasia of the hip (DDH) after birth. This is a condition where the hip socket is shallow or the joint is loose. Most cases identified early are mild and resolve with observation or a simple brace worn for several weeks. Screening typically involves a physical exam at birth and sometimes a hip ultrasound at around 6 weeks of age.
What to Expect After a Frank Breech Birth
If your baby is delivered by cesarean for frank breech, recovery follows the same timeline as any cesarean: a hospital stay of two to four days, several weeks of limited activity, and full recovery over about six weeks. The surgery itself is routine and doesn’t differ significantly from a cesarean performed for other reasons.
Babies born frank breech, whether vaginally or by cesarean, sometimes prefer to keep their legs extended upward for the first few days or even weeks after birth. This is simply a habit from their position in the womb and resolves naturally as the baby stretches and moves. It’s not a sign of a problem, just a quirk that parents often notice when trying to fasten a diaper around legs that want to point straight up.