Going Into Labour Before a Planned Caesarean

What to do first

Ring your maternity unit and say two things: that you think you are in labour, and that you have a planned caesarean booked, with the date. That second sentence changes how the call is triaged.

The same triggers apply as for anyone else: regular painful contractions, waters breaking, bleeding, or reduced fetal movements. NICE asks that a woman contacting her midwife or maternity unit for advice is assessed by telephone triage, with a decision about whether a face-to-face assessment is needed.

Stop eating from that point, and ask what you can drink. Fasting instructions exist because a caesarean may now happen sooner than planned. The NHS tells women having a planned caesarean not to eat for a set period beforehand; the HSE says you will be asked to fast for a few hours before the procedure and may be allowed water for part of that time. Once you are in labour with a caesarean booked, those instructions start applying immediately, and your unit will tell you exactly what they are.

Does the caesarean still happen?

Almost always, yes. Going into labour before the date does not cancel the operation; it changes when it happens and how urgently.

What changes is the label. NICE's caesarean guideline distinguishes between a planned caesarean and one carried out after labour has begun, and the urgency of an unscheduled caesarean is categorised so that teams know how quickly the baby needs to be born. A woman who arrives in early labour with a booked caesarean and a well baby is not an emergency in the category 1 sense; she is a caesarean that has moved up the list.

If you have changed your mind and would prefer to labour, say so. That is a live option in early labour and it is a decision that remains yours; NICE asks that women be supported to accept or decline care and to change their minds.

Why the timing matters clinically

A caesarean performed once labour is established is a different operation from one performed on a quiet Tuesday morning. The lower part of the uterus is thinner and more vascular, the baby's head may be deeper in the pelvis, and blood loss tends to be greater. Teams anticipate this rather than being surprised by it, and it is one reason units prefer to schedule caesareans before labour is likely.

It is also the reason the date you were given was chosen. Planned caesareans are generally scheduled to balance the chance of labour starting first against the benefits to the baby of a little more time in the uterus.

What changes about the anaesthetic

Usually nothing. NICE's recommendation still applies: "offer women who are having a caesarean birth regional anaesthesia in preference to general anaesthesia". Most unscheduled caesareans in the UK and Ireland are still done awake, under a spinal.

Two things can change it. If you have laboured with an epidural already in place, it may be topped up for the operation rather than a fresh spinal being sited. And if the baby needs to be born very quickly, a general anaesthetic may be recommended because it works faster — the Obstetric Anaesthetists' Association lists exactly that as a reason for a general.

The OAA's material on emergency caesareans is worth reading in advance for that reason. It is the same operation, done with more urgency, and being told what the anaesthetic options are before the day makes the conversation in the room shorter.

What stays the same

The preparation is unchanged: a gown, a cannula in your hand or arm, a urinary catheter, and a small area of pubic hair trimmed or shaved if needed. The NHS and HSE both describe this sequence. Antacids are offered before a caesarean, as NICE recommends, to reduce stomach acidity.

Your birth partner can normally be with you under a regional anaesthetic, and normally cannot under a general. Skin-to-skin, delayed cord clamping and your feeding plan are all still on the table and worth restating when you arrive, because the person receiving you may not be the person who booked you.

If labour is very advanced when you arrive

Occasionally a woman with a booked caesarean arrives close to fully dilated. At that point the team will discuss whether a vaginal birth is now the safer option, particularly if the reason for the caesarean was not an absolute one.

This is a genuine decision, not a fait accompli. Ask what the original reason for the caesarean was, and whether it still applies at this point in labour. If the reason was, for example, your own preference or anxiety about vaginal birth, that reason has not evaporated because you are 8 cm dilated, and the RCOG's position on supporting a woman's considered choice does not expire in the corridor.

Before the date: what to have ready

Because the date is not a guarantee, treat the fortnight before it as though you might go into labour — because you might. Hospital bag packed, the route sorted, childcare arranged, and the phone number for the unit somewhere other than a partner's pocket.

It is also worth having your preferences for an unscheduled caesarean written down. Most caesarean birth plans are written for a calm morning: lowering the screen, who cuts the cord, music, skin-to-skin in theatre, which arm the monitoring goes on so you can hold your baby. Those preferences do not stop being possible just because labour started first, and having them on one page means someone can read them quickly.

Questions worth asking on arrival

How urgent is this being treated as? Am I on the list now, or being watched? What anaesthetic are you planning, and would that change if things speed up? Can my birth partner come with me? Which of my preferences can still happen?

NICE asks that consent for a caesarean be sought only after evidence-based information has been given, and that the discussion be recorded. Arriving in labour does not lower that standard — it just compresses the time in which it happens, which is exactly why knowing the questions in advance is worth doing.