Frank breech means your baby is positioned bottom-down in your uterus with both legs extended straight upward, feet near the face, like a pike position. It’s the most common type of breech presentation and has the best outlook among breech positions when it comes to both turning the baby and delivery options.
How Frank Breech Differs From Other Breech Types
In a normal head-down (vertex) position, the baby’s head is lowest in the uterus, ready to enter the birth canal first. In any breech presentation, that orientation is flipped. What distinguishes the types is what the baby is doing with its legs.
- Frank breech: The baby’s buttocks point downward. Both hips are flexed and both legs extend straight up along the body, with feet near the head.
- Complete breech: The baby is sitting cross-legged or in a tuck position, with both hips and knees bent.
- Footling breech: One or both legs dangle downward, meaning a foot would enter the birth canal first.
Frank breech is sometimes described as looking like the baby is folded in half at the waist. The buttocks form the “presenting part,” the body part closest to the cervix.
Why Babies End Up in This Position
Earlier in pregnancy, babies flip and roll freely because there’s plenty of room. Most settle into a head-down position by 36 to 37 weeks as space tightens. When a baby stays breech, it’s often because something limits that final rotation. Known risk factors include a uterus with an unusual shape, the placenta sitting low or over the cervix, too much or too little amniotic fluid, and carrying multiples. First pregnancies also carry a slightly higher chance because the uterine muscles are tighter and may restrict movement. In many cases, though, there’s no identifiable reason at all.
How It’s Detected
Your provider may suspect a breech position during a routine belly exam in the third trimester. When a baby is frank breech, the hard, round head can often be felt near the top of the uterus while the softer buttocks sit lower. An ultrasound confirms the position and clarifies which type of breech it is. This distinction matters because delivery planning differs depending on whether it’s frank, complete, or footling.
Turning the Baby: External Cephalic Version
If you’re diagnosed with frank breech around 36 to 37 weeks, your provider will likely discuss a procedure called an external cephalic version (ECV). During an ECV, a doctor uses firm, guided pressure on your abdomen to manually rotate the baby into a head-down position. It’s typically done in a hospital setting so the baby’s heart rate can be monitored throughout.
Frank breech has the highest ECV success rate among all breech types. One study found the procedure worked in about 78% of frank breech cases, compared to roughly 40% for other breech positions. The pike position of the legs may actually make it easier for the baby to somersault during the maneuver. If the attempt doesn’t work, it can sometimes be tried again, and your provider will discuss delivery options from there.
Delivery Options for Frank Breech
When an ECV doesn’t succeed or isn’t attempted, delivery planning becomes the next conversation. A planned cesarean section is the most common route for breech babies in most hospitals today. However, the American College of Obstetricians and Gynecologists (ACOG) states that a planned vaginal breech delivery may be reasonable when specific conditions are met and the hospital has an established protocol in place.
The criteria that hospitals typically use for vaginal breech delivery include: the pregnancy is past 37 weeks, the baby is in a frank or complete breech position, no fetal abnormalities are seen on ultrasound, the baby’s estimated weight falls between about 5.5 and 8.8 pounds, and the mother’s pelvis is adequate in size. Some protocols also require that the baby’s head is flexed (chin tucked) and that there’s sufficient amniotic fluid. Labor is not induced or sped up with medication in these cases, and strict benchmarks for labor progress must be met.
Vaginal breech delivery requires a provider experienced in the technique, and not all hospitals offer it. If it’s something you want to explore, ask early whether your hospital and care team support it.
Hip Screening After Birth
One important thing to know about frank breech babies is their increased risk for developmental dysplasia of the hip (DDH), a condition where the hip joint doesn’t form properly. The risk is highest specifically in frank breech because the baby’s extended legs pull on the hamstring muscles across the flexed hip, which can affect how the hip socket develops over weeks in that position.
Research identifies breech presentation as one of the top risk factors for DDH, nearly doubling the odds compared to head-down babies. A large case-control study found that babies born breech had about 1.9 times the risk of hip dysplasia. The other major risk factors are a family history of hip problems and tight swaddling of the legs after birth.
Because of this link, many pediatric guidelines recommend an ultrasound of the hips for all babies who were in a breech position, typically performed around 6 weeks of age. DDH is highly treatable when caught early, usually with a soft brace that holds the hips in a healthy position for several weeks. When it goes undetected, it can lead to problems with walking and joint pain later in life. If your baby was frank breech, make sure hip screening is part of your postnatal follow-up, even if the physical exam at birth looks normal.