What If Baby Is in the Wrong Position at Your 12-Week Scan?

It's quite common for babies to be in a tricky position at the 12-week scan. If your baby is curled up, facing the wrong way, or constantly moving, the sonographer may struggle to get the measurements they need. Here's what happens and what it means.

Why Baby's Position Matters
What the Sonographer Will Do
How Long Will It Take?
Will I Need to Come Back?
Does It Mean Something Is Wrong?
Tips to Encourage Baby to Move

Why Baby's Position Matters

At your 12-week scan, the sonographer needs to take several precise measurements:

Crown-rump length (CRL): measuring your baby from the top of the head to the bottom. For an accurate measurement, your baby needs to be fairly straight, not curled up.
Nuchal translucency (NT): measuring fluid at the back of the neck. Your baby needs to be lying on its back, not face-down or curled forward.

If your baby is curled up, face-down, or moving constantly, these measurements can be difficult or impossible to take accurately. The sonographer can't force your baby to move — they have to wait for the right position.

What the Sonographer Will Do

If your baby isn't cooperating, the sonographer will try several gentle tricks to get them to shift:

Ask you to roll onto your side: Sometimes a change in your position encourages the baby to move.
Ask you to cough: A sudden jolt can make the baby wriggle.
Ask you to walk around: You may be sent out for a 10-minute walk, ideally after having a drink or a snack.
Wiggle the probe: Sometimes gentle movement of the probe on your tummy can encourage the baby to shift.
Wait: Often, patience is the best approach. The sonographer may simply wait a few minutes for the baby to move on their own.

How Long Will It Take?

Most 12-week scans take 15-20 minutes, but if your baby is in a difficult position, the scan could take longer — sometimes up to 45 minutes. The sonographer won't rush, because inaccurate measurements could lead to incorrect results, especially for the NT screening.

If the scan is taking a long time and your bladder is full (if you were asked to have one), tell the sonographer. They may let you empty your bladder partway through.

Will I Need to Come Back?

In most cases, no — the sonographer will eventually get the measurements they need. But sometimes, if the baby really won't cooperate, you may be asked to come back later the same day or on another day. This is fairly common and isn't a sign that anything is wrong.

If you do need to come back, it's usually within a few days. Try not to worry — babies move around constantly, and a different time of day or a different position can make all the difference.

Does It Mean Something Is Wrong?

No. A baby being in the wrong position has nothing to do with their health or development. It simply means they're curled up, facing the wrong way, or moving around — all of which are completely normal at 12 weeks. Your baby is only about 5-6cm long at this stage and has plenty of room to somersault.

The position issue is purely practical: the sonographer needs a specific view to take accurate measurements. It doesn't reflect your baby's wellbeing.

Tips to Encourage Baby to Move

While you can't control your baby's position, a few things may help:

Have a cold drink before the scan — the change in temperature can make the baby move.
Eat a small snack 30 minutes beforehand — babies often become more active after you eat.
Walk around before your appointment rather than sitting in the waiting room.
Stay relaxed — tension can make the scan more uncomfortable, which doesn't help anyone.

Frequently Asked Questions

### Will I need to pay again if I come back for a repeat scan?

On the NHS, no — repeat scans for clinical reasons are free. For private scans, check the clinic's policy — many offer a free rescan if measurements couldn't be taken.

Can the sonographer force the baby to move?

No. The sonographer can only use gentle techniques like asking you to roll, cough, or walk. They can't physically manipulate your baby.

Does a moving baby mean it's healthy?

Movement is a good sign, but the sonographer will assess your baby's health through several measurements, not just movement. A still baby isn't necessarily a concern — they may just be sleeping.

Further reading:

NHS — Antenatal care and screening

This article is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider.

Last reviewed: June 2026

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