Bleeding in pregnancy: early (miscarriage, ectopic, molar) and late (previa, abruption) from the nursing side
- Assessment
Any vaginal bleeding in pregnancy is treated as a possible emergency: the nurse assesses the woman and the baby, looks for shock and gets medical help fast.
What it is
Vaginal bleeding can occur at any point in pregnancy. In the first months the main causes are miscarriage and ectopic pregnancy; later, placental abruption, placenta previa and vasa previa. Some causes are minor, such as brief spotting at implantation or an irritated cervix. Others threaten the life of the woman or the baby. The nurse does not diagnose the cause. She assesses how much bleeding there is and how the woman and the fetus are, avoids what could make it worse, and calls in time.
Reference values
- Brief, light spotting 10 to 14 days after conception can be implantation bleeding.
- Other causes: bloody show of labour, cervical polyp, cervical infection, irritation after intercourse or a pelvic exam, and a subchorionic haematoma.
- Risk factors for placenta previa: previous previa, scarring from caesarean or other uterine surgery or abortion, many previous pregnancies, twins or triplets, IVF; also smoking, cocaine and older age.
- Risk factors for abruption: high blood pressure, diabetes, smoking, cocaine or alcohol, trauma, multiple pregnancy.
- Ectopic pregnancy is diagnosed with a pregnancy test, hCG levels and vaginal ultrasound; placenta previa with ultrasound.
What you need
- Pads to see the amount and colour of the bleeding.
- Equipment for vital signs and a fetal Doppler.
- Access to the obstetric emergency kit and to blood type and Rh.
How to measure it (and why)
- Ask the weeks of pregnancy, when the bleeding began, its amount and colour — they point to an early or a late cause.
- Measure pulse, blood pressure, respiratory rate and level of consciousness — they show shock early.
- Ask about pain: one-sided pelvic pain, shoulder pain or fainting — they suggest a ruptured ectopic pregnancy.
- In the second half of pregnancy feel for contractions and pain and listen to the fetal heart — abruption cuts the baby's oxygen.
- Put nothing in the vagina when previa is known or suspected; the examination is a medical decision — it can trigger heavy bleeding.
- Check blood type and Rh — an Rh-negative woman may need Rh immune globulin.
- Record everything and keep watching while the physician arrives or the transfer is arranged — bleeding can return.
How to read it
- Early bleeding with one-sided pain or fainting: think of ectopic pregnancy; rupture is a surgical emergency with treatment for shock.
- Late bleeding with painful contractions: think of abruption; sudden late bleeding: think of placenta previa or vasa previa.
- With placenta previa the bleeding can be severe, stop on its own and return days or weeks later; labour sometimes starts within days of heavy bleeding.
- Teach: avoid intercourse until the provider says it is safe; with previa, pelvic rest; go to hospital at once if previa bleeds.
Next step: when to call for help
- Any vaginal bleeding in pregnancy: tell the physician right away.
- Signs of shock, signs of ectopic rupture, heavy bleeding, or bleeding with painful contractions: emergency, call now.
- Abnormal or absent fetal heart rate: call the physician at once.
- A woman with placenta previa who bleeds: hospital immediately.
Test yourself
Think of the answer, then tap the question to see it.
Which signs suggest a ruptured ectopic pregnancy?
Sudden, severe, sharp lower abdominal pain, shoulder pain, fainting, low blood pressure and strong rectal pressure.
Why is nothing placed in the vagina when placenta previa is suspected?
Because it can cause heavy bleeding; any vaginal examination is a medical decision.
What are the two main signs of placental abruption?
Vaginal bleeding and painful uterine contractions.
Why does the nurse check the Rh of a pregnant woman who bleeds?
An Rh-negative woman may need Rh immune globulin.
Connections
Educational content for students; it does not replace your institution's protocols, supervised clinical training or a prescriber's order. Dose-calculation examples use made-up numbers: they are educational, not a clinical order.
Sources: Vaginal bleeding in pregnancy (MedlinePlus, U.S. National Library of Medicine, 2026); Ectopic pregnancy (MedlinePlus, U.S. National Library of Medicine, 2026); Placenta previa (MedlinePlus, U.S. National Library of Medicine, 2026); Placental abruption (MedlinePlus, U.S. National Library of Medicine, 2026).
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