Medical Oncologist
CION Cancer Clinics
Monitoring the baby around cancer surgery | CION Cancer Clinics
The baby's heartbeat is checked before your operation and again when you wake up. Later in pregnancy, it may also be watched throughout surgery, with an obstetrician ready to act. Most of the baby's protection comes from keeping you stable: steady blood pressure, good oxygen and warmth. This page explains the checks, how they change with the weeks of pregnancy, and what to ask your team. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MM
Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
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On this page
- How is the baby watched during cancer surgery?
- What kinds of checks might you hear about?
- What happens before, during and after?
- How does monitoring differ early and late in pregnancy?
- What do families often misunderstand about monitoring?
- What should you ask, and what can this page not tell you?
- Common questions about monitoring the baby around surgery
The short answer
How is the baby watched during cancer surgery?
The baby's heartbeat is checked before the operation and again as soon as you wake up. Later in pregnancy, some teams also watch the heartbeat during surgery itself, with an obstetrician ready to act if the baby shows signs of strain.
Why the plan changes with the weeks of pregnancy
Early in pregnancy, nothing could be done for the baby even if a problem appeared during surgery. So the heartbeat is usually checked before and after, not throughout. Once the baby is old enough to survive outside the womb with newborn care, watching during the operation starts to make sense, because the team could act on what it sees. The obstetrician decides with you which approach fits your pregnancy.
What monitoring protects
Most of the baby's safety during surgery comes from looking after you. Keeping your blood pressure steady, your oxygen high and your body warm keeps blood flowing to the womb. Lying tilted slightly to the left takes the weight of the womb off a large vein. Monitoring tells the team whether all of this is working for the baby.
Monitoring watches the baby. It does not by itself make the operation safer, and a normal trace does not rule out every problem.The tools
What kinds of checks might you hear about?
Your team will choose among these. You may have more than one around the same operation.
Handheld Doppler
A small probe placed on your belly that lets the team hear the baby's heartbeat. It is quick, simple and often used before and after surgery, especially early in pregnancy.
CTG trace
Cardiotocography, or CTG, records the baby's heartbeat and any tightening of the womb on a paper or screen trace over a longer time.
Usually used
- Later in pregnancy
- During or straight after surgery
- When contractions are a concern
Ultrasound scan
Shows the baby's movement, growth, the fluid around the baby and the placenta. It is often done before surgery to set a starting point.
Your own sense of movement
Once you can feel the baby move, your report of movements after surgery is part of the monitoring. Tell the nurses what you notice.
Not sure whether this applies to you?
Ask an oncologistAround the operation
What happens before, during and after?
Before
An obstetrician sees you, often with a scan, and records how the baby is doing. The team agrees whether to monitor during surgery and what they would do if a problem appeared.
During
The anaesthetist keeps your blood pressure, oxygen and temperature steady. If monitoring is planned, a trained person watches the baby's heartbeat throughout, where the operation site allows.
Waking up
The baby's heartbeat is checked in the recovery area. Nurses also look for tightening of the womb, bleeding or leaking fluid.
The days after
Checks continue on the ward. Pain is controlled with medicines chosen for pregnancy, because pain itself can bring on contractions.
Side by side
How does monitoring differ early and late in pregnancy?
Earlier in pregnancy
Later in pregnancy
Heartbeat usually checked before and after surgery
Heartbeat may be watched throughout the operation
Handheld Doppler or scan is common
CTG trace is more often used
No plan for delivery during surgery
Plan agreed in advance for an emergency delivery
Newborn team not usually involved
Newborn doctors told and available
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After surgery, these cannot wait
If the baby is moving less than usual, or you have bleeding from the vagina, leaking fluid, or regular tightening or pain in the belly, tell the nurse at once while in hospital. If you are already home, go to the nearest hospital with a labour ward the same day. Do not wait to see if it settles, and do not lie down and count movements at home first.
Commonly believed
What do families often misunderstand about monitoring?
"If they are not watching the baby during surgery, they do not care about it."
Early in pregnancy, watching throughout would not change what the team could do. Checking before and after, and keeping the mother stable, is the standard way the baby is protected then.
"A slower heartbeat on the trace means the baby is in danger."
Anaesthetic medicines cross to the baby and can quieten the heartbeat pattern for a while. The team knows this and reads the trace with it in mind.
"The scan and the heartbeat machine can harm the baby."
Ultrasound, Doppler and CTG use sound waves, not radiation. They are the same checks used in ordinary antenatal care.
"Once she is home, the baby does not need watching."
The days after surgery still matter. Your follow-up visits with the obstetrician, and your own attention to movements, are part of the plan.
Before you sign
What should you ask, and what can this page not tell you?
Ask your team exactly how the baby will be checked around your operation, and who will be doing it. The answer depends on your weeks of pregnancy, the operation and your own health, so no general page can give it to you.
Questions worth asking
Will an obstetrician see me before surgery? Will the baby's heartbeat be watched during the operation, or only before and after? If something changes during surgery, what would the team do, and who decides? Is there a labour ward and newborn unit in the same hospital? Who do I call if I notice less movement once I am home?
Who this approach does not suit
Monitoring during surgery is not always possible. If the operation is on the abdomen close to the womb, a probe may not fit on the belly. Very early in pregnancy, the heartbeat may be hard to pick up with the tools used in theatre. Your team will explain what is realistic.
What monitoring cannot promise
A reassuring trace is good news for that moment. It is not a promise about the rest of the pregnancy, and follow-up still matters.
Questions we are asked
Common questions about monitoring the baby around surgery
Will someone check my baby while I am asleep?
That depends on how far along you are. Later in pregnancy, many teams watch the baby's heartbeat during the operation with an obstetrician on hand. Earlier, the heartbeat is usually checked just before and just after. Ask your team which plan they have made for you, and why.
Can anaesthesia change the baby's heartbeat?
Yes, for a while. Medicines used for anaesthesia and pain relief can cross to the baby and make the heartbeat trace look quieter. This is expected and usually passes as the medicines wear off. The team reading the trace knows to allow for it and looks at the overall pattern.
What happens if the baby shows strain during surgery?
The first step is usually to improve things for you: more oxygen, fluids, adjusting blood pressure or your position. Later in pregnancy, if the baby does not recover, an emergency delivery may be considered. This plan should be discussed with you before the operation, not decided without you.
Is ultrasound safe during cancer treatment?
Ultrasound uses sound waves rather than radiation. It is the same kind of scan used in routine pregnancy check-ups and is widely used to check the baby before and after surgery. It does not interfere with your cancer treatment. Your team may use it several times during your care.
Can surgery bring on early labour?
It can, especially with operations on the abdomen or when pain is poorly controlled. That is why the womb is watched for tightening afterwards. In some cases the obstetrician may use medicines to settle contractions. Tell the nurses about any regular tightening or cramping, however mild it seems.
Will a newborn doctor be there?
Later in pregnancy, the newborn team is usually told about the operation and kept available in case an early delivery is needed. Earlier in pregnancy this is not usually necessary. If it matters to you, ask whether the hospital has a newborn intensive care unit on site.
How do I keep track of movements at home?
Get to know your baby's usual pattern of movement and notice any change from it. There is no set number you have to count. If movements feel less than usual, contact the labour ward or go to hospital the same day. Do not wait until the next day to see what happens.
Can my husband or mother stay with me?
Family cannot usually be in the operating theatre. Most hospitals let one person wait nearby and join you in the recovery area or on the ward. Ask the team in advance so that someone is available to hear updates about both you and the baby.
Meet the Specialists
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Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
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Sources
- NHS — Your baby's movements
- NHS — Pregnancy
- National Cancer Institute — Surgery to treat cancer
- Cancer Research UK — Surgery for cancer
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Anaesthesia risk to the babyWhat being put to sleep means for the pregnancyWhich trimester is safest for surgeryHow the weeks of pregnancy change the planWho should be in the room: obstetrics and oncology togetherThe team that plans and watches over you bothComplications and red flagsOther warning signs after any cancer operation
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