Baby's position: breech, posterior & transverse

As birth approaches, you’ll hear a lot about your baby’s position — whether they’re head-down, bottom-first, sideways, or facing your front or back. It matters because position can affect how (and sometimes whether) you birth vaginally. Here’s a plain-language guide to the main ones, and what they mean.

The ideal: head-down and facing your back. The best position for birth is cephalic (head-down) with your baby facing your spine — often called “occiput anterior”. This lets the head press evenly on the cervix and move through the pelvis smoothly. Most babies settle head-down by the last weeks, so until then there’s usually no need to worry about position at all.

Posterior (back-to-back). Here your baby is head-down but facing your tummy rather than your spine (“occiput posterior”). Many babies in this position turn during labour and are born normally, but it can be linked with more back pain in labour, a longer labour, and sometimes needing a bit of help. Staying upright and mobile, and positions that lean you forward, may encourage your baby to rotate.

Breech (bottom or feet first). A breech baby is positioned to come bottom- or feet-first. It’s common earlier in pregnancy and most babies turn head-down by around 36 weeks — only a small percentage remain breech at term. If yours is still breech late on, your team will talk through options (covered in the separate guide on turning a breech baby): trying to turn the baby with a procedure called ECV, a planned caesarean, or in some cases a vaginal breech birth with an experienced team.

Transverse (sideways). A transverse lie means your baby is lying sideways across your uterus. This is fine earlier on, but if it persists near term it’s not safe for a vaginal birth (and carries a risk if your waters break), so it needs to be managed — usually with monitoring and a plan that may involve trying to turn the baby or a caesarean. Your team will keep a close eye on it.

How your baby’s position is checked. Your midwife or doctor works out your baby’s position by feeling your tummy (palpation) at your appointments, and confirms with an ultrasound if they’re unsure. This is usually done more carefully from around 36 weeks, when position starts to matter for birth planning.

Can you influence position? Possibly a little. Staying active, upright and leaning forward (rather than reclining back on the sofa for hours) is often suggested to encourage a good position, though the evidence is mixed. It certainly won’t hurt to keep mobile — but babies also move on their own schedule, and position isn’t something you can fully control.

Try not to worry too early. Before around 36 weeks, there’s usually plenty of time for your baby to move into a good position, so an “unusual” lie at your 20-week scan or an earlier appointment is rarely a concern. Position becomes a planning conversation in the final weeks, not before.

When it’s decided. By the last few weeks, your team will confirm your baby’s position and, if it’s not head-down, discuss your options clearly so you can make an informed choice. Whatever your baby’s position, you’ll have support to plan a safe birth — and if you have any bleeding, your waters break with a baby who isn’t head-down, or you’re worried, contact your maternity unit promptly.

The bottom line: most babies end up head-down and well-positioned by term, so try not to fret about position early on. If your baby is breech, posterior or transverse late in pregnancy, it’s a conversation and a plan — not a crisis — and your team will guide you through the safest way to meet your baby. Whatever unfolds, you’ll be part of every decision, with the reasons explained clearly so nothing simply happens to you.