What Is a Feet-First or Buttocks-First Fetal Delivery?

A feet-first or buttocks-first fetal delivery, known medically as a breech delivery, happens when a baby exits the birth canal in any position other than the usual head-down (cephalic) orientation. Roughly 3 to 4 percent of babies at full term are still in a breech position, though the proportion is much higher earlier in pregnancy. Today, the vast majority of these babies are delivered by cesarean section, but vaginal breech birth remains an option in carefully selected situations, and the decision between the two involves trade-offs that are more nuanced than many people realize.

Types of Breech Presentation

Not all breech positions are the same, and the type matters for both risk and delivery planning. In a frank breech, the baby’s buttocks lead the way with the legs extended upward so the feet are near the head. This is the most common type and generally considered the most favorable for vaginal delivery. In a complete breech, the baby sits cross-legged with both hips and knees flexed, almost like sitting in a tailor position. In a footling breech, one or both feet dangle below the buttocks and would enter the birth canal first. A kneeling breech, where one or both knees present first, is sometimes grouped with the footling type.

The distinction is clinically important. A large U.S. cohort study of planned community births found that neonatal hospital transfers, NICU admissions, and cord prolapse were all roughly twice as common in footling or kneeling presentations compared with frank or complete breech. Cord prolapse occurred in about 7 percent of footling or kneeling births versus less than 1 percent for frank breech.¹ Because a foot or knee is smaller than the buttocks, it does not dilate the cervix as fully, which can leave the aftercoming head at risk of getting stuck. This is why most providers will not attempt a vaginal delivery for a footling breech at term.

Why Some Babies Stay Breech

Earlier in pregnancy, babies somersault freely. Around 22 to 26 weeks, more than a third of babies are in a breech position.² Most turn head-down on their own as the uterus becomes more cramped and the heavier head gravitates downward. But for the small percentage that do not turn, several factors raise the odds of staying breech.

A large analysis of the Hungarian national obstetric database found that breech presentation was independently linked to older maternal age, first pregnancies, prior stillbirth or miscarriage, assisted reproduction, conditions like high blood pressure and low amniotic fluid, and fetal factors including female sex, younger gestational age, structural abnormalities, and lower birth weight.³ A nationwide population-based study found elevated odds for fetal growth restriction, low amniotic fluid, a history of prior cesarean, and congenital abnormalities, with the latter two roughly doubling the likelihood.⁴ Placenta previa, where the placenta sits low in the uterus and physically blocks the baby’s path to a head-down position, is another recognized contributor.⁵

Sometimes, though, no identifiable cause exists. The baby just never turns, and the pregnancy is otherwise completely normal. This is worth knowing because a breech diagnosis does not automatically signal something wrong with the pregnancy or the baby.

When Babies Turn on Their Own

Spontaneous turning from breech to head-down is common and happens more often than many expecting parents realize. A classic prospective study using weekly ultrasounds from 32 weeks found that 57 percent of breech babies turned head-down on their own before delivery.⁶ A more recent study reported an even higher rate of about 65 percent turning spontaneously between 32 and 36 to 37 weeks.⁷

Several things reduce the chances of a spontaneous flip. Babies with extended legs (the frank breech position), lower birth weight, a short umbilical cord, and first-time mothers are all less likely to turn on their own.⁶ A large retrospective cohort tracking over 25,000 pregnancies found that among the roughly 37 percent who were breech at 22 to 26 weeks, only about 4 percent remained breech at the onset of labor.² So if you learn your baby is breech at a mid-pregnancy scan, the odds are strongly in favor of them turning without any intervention.

External Cephalic Version

When a baby has not turned by about 36 to 37 weeks, providers often offer external cephalic version, or ECV. This is a hands-on procedure where a clinician presses on the mother’s abdomen to coax the baby into a head-down position. It is typically done in a hospital setting with continuous fetal monitoring so that if anything goes wrong, an emergency cesarean can be performed quickly.

Success rates vary, but a 10-year cohort study reported that about 70 percent of ECV attempts were successful overall, with higher success when the baby was in a transverse (sideways) lie rather than breech.⁸ Factors that helped included having had a prior pregnancy, adequate amniotic fluid, and lower body mass index. First-time mothers and those with higher BMI had lower success rates.

The procedure is generally safe but not risk-free. A systematic review of version-related risks found that the most common complication was a temporary abnormal fetal heart-rate pattern, occurring in about 6 percent of cases. More serious events were rare: emergency cesarean was needed in fewer than half a percent of attempts, placental abruption occurred in about 0.1 percent, and perinatal death in about 0.16 percent.⁹ A single-center analysis of over 1,100 ECVs confirmed a low serious complication rate of about 0.45 percent, though the study did record one fetal death attributable to the procedure.¹⁰ Even after a successful turn, a small percentage of babies flip back to breech before labor begins.

Pain management during ECV can make a difference. A meta-analysis of randomized trials found that women who received spinal or epidural analgesia during the procedure had a significantly higher success rate, about 58 percent versus 43 percent without it, along with less pain and a higher chance of ultimately delivering vaginally.¹¹ One randomized trial in women who had given birth before found even more dramatic results, with 87 percent success using spinal analgesia versus 58 percent without.¹²

How the Cesarean Became the Default

For most of obstetric history, vaginal breech delivery was simply what happened when a baby presented buttocks-first. Experienced practitioners developed a repertoire of manual techniques to guide the baby out safely. That changed abruptly in the year 2000 with the publication of the Term Breech Trial, a large international randomized trial that compared planned cesarean with planned vaginal delivery for term breech babies. The trial found lower rates of serious newborn complications and death in the planned cesarean group, and its impact was immediate.

Within months, cesarean rates for breech presentation surged worldwide. An analysis of Dutch obstetric data found that the trial produced “an exceptionally rapid change in medical behaviour” among obstetricians, and that newborn outcomes improved as cesarean rates rose.¹³ A longer-term Dutch population study confirmed that the shift toward elective cesarean for breech was followed by decreased rates of newborn death and complications.¹⁴ A review of the trial’s broader influence concluded that cesarean delivery became “the recommended method of delivery” for breech in most clinical settings.¹⁵

The story did not end there, however. A two-year follow-up of the Term Breech Trial children found no difference in death or developmental delay between the cesarean and vaginal groups, about 3 percent in both.¹⁶ That finding raised questions about whether the early neonatal benefits of cesarean translated into lasting advantages. Meanwhile, a systematic review and meta-analysis of maternal outcomes found that planned vaginal breech delivery was actually associated with lower rates of severe maternal complications, with a relative risk of about 0.30 compared with cesarean.¹⁷ Cesarean delivery, after all, is major abdominal surgery with its own set of risks: longer recovery, higher infection rates, and potential complications in future pregnancies.

When Vaginal Breech Delivery Is Still Offered

Despite the overall shift toward cesarean, a number of hospitals and birth centers continue to offer vaginal breech delivery under strict selection criteria. A Swedish center with a dedicated breech birth team published outcomes showing that planned vaginal delivery carried about a 3 percent rate of serious neonatal complications compared with 0.7 percent for planned cesarean, an absolute difference of about 2.4 percent.¹⁸ That means roughly 42 vaginal breech deliveries would need to happen for one additional baby to experience a serious complication compared with cesarean. Whether that margin is acceptable depends on how you weigh it against the maternal costs of surgery.

Typical selection criteria for a vaginal breech delivery include a frank or complete breech position (not footling), an estimated fetal weight within a normal range, a flexed fetal head (not tilted backward), no placenta previa, and a mother who has been fully counseled about the risks and is motivated to try. The provider’s experience with breech vaginal delivery is itself a major factor. As the shift to cesarean has accelerated, fewer obstetricians have trained in vaginal breech technique, creating a self-reinforcing cycle in which the skill becomes rarer and therefore harder to maintain. Simulation training has been recognized as particularly suited to filling this gap, given that vaginal breech delivery is uncommon yet must be handled competently when it occurs.¹⁹

What Happens During a Vaginal Breech Birth

A vaginal breech delivery looks quite different from a head-first birth and requires specific techniques that have been refined over centuries. The core principle is patience: the provider avoids pulling on the baby and instead allows gravity and the mother’s contractions to do the work. Excessive traction on the baby’s body is one of the most dangerous mistakes, because it can cause the head to become trapped behind an incompletely dilated cervix.²⁰

Once the baby’s body has delivered up to the shoulders, the arms need to be freed. This is typically done with a technique called the Løvset maneuver, where the provider gently rotates the baby’s body 180 degrees while guiding each arm downward across the chest. The most critical moment comes last: delivering the aftercoming head. The provider supports the baby’s body on their forearm, places two fingers on the baby’s cheekbones to keep the chin tucked, and uses the other hand to apply gentle downward pressure on the back of the skull. This is the Mauriceau-Smellie-Veit maneuver. An alternative, the modified Prague maneuver, involves lifting the baby’s body upward and rotating it around the pubic bone to flex the head and guide it out.²¹ These names sound arcane, but the underlying principle is straightforward: keep the head flexed and let it emerge gradually rather than forcing it.

Breech in Twins

Breech presentation is especially common in twin pregnancies, particularly for the second twin, who may shift position after the first baby is delivered. The management approach differs from singleton breech. When the first twin is head-down, many guidelines support vaginal delivery even if the second twin is breech. A study comparing outcomes of second twins found no significant difference in short-term newborn health measures between those born head-first and those born breech vaginally.²² A separate analysis confirmed that vaginal delivery of twins where the second is breech appears as safe as delivery of twins where both are head-down, reinforcing the idea that vaginal twin delivery should remain the preferred method when the first twin is vertex.²³

The reason the second twin gets different treatment is partly mechanical: the cervix is already fully dilated from delivering the first baby, so the risk of head entrapment is much lower. The attending provider also typically has the option of reaching in and turning the second twin (internal podalic version) if needed. This makes twin breech delivery a different clinical scenario from singleton breech, and the risk calculus shifts accordingly.

Preterm Breech

Breech presentation is far more common in preterm babies simply because they have not yet had time to settle into a head-down position. At very early gestational ages, more than half of babies may be breech. The question of how to deliver a preterm breech baby is, if anything, even less settled than the term breech debate, because randomized trial data in this population are thin.

A study from Saudi Arabia found that neonatal mortality was significantly higher with vaginal delivery compared to cesarean for preterm singleton breech, though morbidity rates were similar.²⁴ A European study looking at risk factors for poor outcomes in vaginal preterm breech delivery identified maternal obesity, smoking, low amniotic fluid, congenital anomalies, and very small babies as particular danger signs.²⁵ These findings suggest that careful case selection matters at least as much in preterm as in term breech deliveries.

Interestingly, a large population-based study of neurodevelopmental outcomes found that at very early gestational ages (before 32 weeks), there was no detectable association between attempting vaginal breech delivery and later developmental delay. However, at moderate preterm gestational ages (32 to 36 weeks), attempted vaginal breech delivery was linked to higher rates of visual disability and autism spectrum disorders compared with vaginal head-first delivery.²⁶ The finding is somewhat counterintuitive, since you might expect the most premature babies to be most vulnerable, and the authors noted that it warrants further investigation.

The Question of Choice and Access

For many pregnant people, the breech diagnosis triggers not just a medical discussion but an emotional one. An integrated review of women’s experiences found that a more woman-centered approach to breech care is needed, because birth experiences have lasting effects on mental health and family well-being.²⁷ In practice, many hospitals no longer offer vaginal breech delivery at all, which limits options regardless of patient preference.

A mixed-methods study surveyed individuals who left the hospital system to pursue home breech birth. Among those who did, most reported feeling denied informed choice (64 percent) and said they were threatened or pressured into cesarean (68 percent). Eighty percent rated their autonomy in the hospital decision-making process as low or very low.²⁸ This is a real tension in modern maternity care: the safest option from a narrow neonatal standpoint may not be the preferred option for every family, and the disappearance of the vaginal breech skill set makes it difficult even for those who want a vaginal birth to find a provider willing to attend one.

The erosion of training compounds the problem. As fewer vaginal breech births happen, fewer new clinicians learn the techniques, which makes vaginal breech birth appear even riskier (because it is now being done mostly by less experienced hands or in emergencies rather than by skilled practitioners), which further discourages the practice. Some academic centers have responded by establishing dedicated breech teams and simulation programs to maintain the skill, but these remain the exception rather than the rule. The debate is unlikely to be fully resolved anytime soon, because it sits at the intersection of clinical evidence, surgical risk, training infrastructure, and deeply personal values about birth.