Placenta Previa and Placental Abruption: Bleeding Warning Signs
Placenta previa and placental abruption can cause bleeding or pain during pregnancy. Learn why any bleeding needs prompt assessment, which symptoms are emergencies and what scans and birth planning may involve.
In this guide
How can placenta problems cause bleeding in pregnancy?
Bleeding during pregnancy has many possible causes and cannot be diagnosed from symptoms alone. Two placental conditions need particular attention: placenta previa, when the placenta lies low and may cover the cervix, and placental abruption, when the placenta separates from the wall of the uterus before birth.
Placenta previa may cause sudden bleeding without pain
A low-lying placenta may be found on an ultrasound. If it remains close to or covers the cervix later in pregnancy, bleeding can be sudden and heavy, often without pain. A low placenta at a mid-pregnancy scan does not always remain low, so attend the follow-up scan your maternity team recommends.
Abruption can cause pain even when little blood is visible
Placental abruption may cause constant abdominal or back pain, a tender or tight-feeling uterus, contractions or bleeding. Some blood can remain inside the uterus, so the amount visible outside does not reliably show how serious the problem is.
A symptom pattern cannot confirm which condition is present
Bleeding may also have other causes. Do not try to diagnose previa or abruption at home, and do not assume that no visible blood means there is no problem when significant pain or illness is present.
| Pregnancy week and due date | Bleeding start / amount / colour | Pain or tightening and when | Baby movement change | Scan or placenta result | Hospital / support person |
|---|---|---|---|---|---|
What should you do if you bleed during pregnancy?
Contact maternity care promptly for any bleeding, particularly in the second half of pregnancy. Heavy bleeding, pain or feeling faint needs emergency action.
Get urgent maternity advice for any new bleeding
Call your maternity unit, obstetric clinician or nearest hospital and describe the pregnancy week, bleeding and pain. Follow their direction on where to go. Do not wait for a routine appointment to report new bleeding in later pregnancy.
Call 112 for heavy bleeding or severe symptoms
Use India’s 112 emergency service or go to emergency care now for heavy bleeding, severe or constant abdominal pain, fainting, marked weakness, breathing difficulty, collapse or rapidly worsening symptoms. Reduced baby movement also needs immediate contact with maternity care.
Do not let a reassuring scan replace assessment of new symptoms
Tell staff if you have been told the placenta is low, but also seek care for new bleeding or pain even if a previous scan was reassuring. Bring scan or maternity records only if they are easy to reach; getting assessed comes first.
How might the care team assess and plan care?
The care plan depends on the cause of bleeding, pregnancy stage, the woman’s condition and the baby’s wellbeing. The team may need to assess urgently before discussing a longer-term birth plan.
Assessment may include observations and ultrasound
Clinicians may check vital signs, ask about pain and bleeding, assess the pregnancy and use ultrasound or other tests. Tell them about previous scans and any prior caesarean or uterine surgery. A trained clinician should decide which examinations are safe and useful.
Follow-up scans can clarify a low-lying placenta
RCOG patient information says most low-lying placentas seen at the 20-week scan are no longer low at follow-up. Attend the recommended repeat scan: an early finding does not establish where the placenta will be later, and not everyone’s placenta moves clear of the cervix.
Birth timing and method are individual decisions
If placenta previa persists or bleeding recurs, the team may discuss closer monitoring, hospital care or caesarean birth. Abruption may require urgent delivery depending on the situation. Ask what the team recommends, why, what alternatives exist and what symptoms mean you should return immediately.
Placenta previa and abruption: frequently asked questions
Can placental abruption happen without visible bleeding?
Yes. Some bleeding can be concealed. Constant pain, uterine tenderness, contractions or feeling faint during pregnancy need urgent assessment even when little blood is visible.
Does a low-lying placenta at 20 weeks mean I will need a caesarean?
Not necessarily. Many low-lying placentas are no longer low at follow-up. If it remains close to or covers the cervix later, your team can explain the birth options based on the scan and your circumstances.
Should I wait to see whether bleeding stops?
No new bleeding in pregnancy should be judged only by whether it stops. Contact maternity care promptly and use emergency care for heavy bleeding, severe pain, faintness or rapid deterioration.
Can an article tell me whether my baby or I are safe?
No. Symptoms and general information cannot establish the cause or severity. A clinician needs to assess the woman and pregnancy; emergency signs require care now.
Words you can use
Report bleeding or pain in pregnancy
Calling a maternity unit or emergency service
“I am about [week] pregnant. Bleeding began at [time] and is [amount / colour]. I also have [pain, tightening, dizziness or other symptoms], and baby movement is [usual / changed / not sure]. My last scan said [placenta result, if known]. Please tell me where I should be assessed now. I will call 112 for heavy bleeding, severe pain or fainting.”
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Sources and publication record
Clinical sources checked 27 September 2026; medical and human Hindi editorial review pending · Sources checked .
- Placenta praevia, placenta accreta and vasa praevia: patient informationRoyal College of Obstetricians and Gynaecologists, United Kingdom
- Bleeding in pregnancy: placenta praevia and placental abruptionNHS Healthier Together
- Emergency Response Support System 112Ministry of Home Affairs