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What causes bleeding or pain in early pregnancy?

Bleeding or pain in early pregnancy — before 12 weeks — is common and understandably frightening. It does not always mean something is wrong, but it always requires investigation. The most important causes to exclude are miscarriage and ectopic pregnancy, both of which require prompt clinical assessment.

Cause Notes
Implantation bleeding Light spotting at 6–12 days after conception; normal and harmless
Cervical ectropion Fragile cervical tissue that bleeds on contact; harmless but requires examination
Threatened miscarriage Bleeding with a closed cervix; pregnancy may continue normally
Miscarriage (incomplete or complete) Bleeding with cramping; cervix may be open; ultrasound confirms viability
Ectopic pregnancy Pregnancy implanted outside the uterus (usually the fallopian tube); potentially life-threatening; requires urgent assessment
Subchorionic haematoma Bleeding between the placenta and uterine wall; often resolves spontaneously

When should you get a scan?

You should seek assessment immediately if you have:

  • Severe one-sided abdominal or pelvic pain — this may indicate an ectopic pregnancy, which is a medical emergency
  • Heavy bleeding (soaking a pad in an hour or less)
  • Bleeding with shoulder tip pain — a sign of internal bleeding from a ruptured ectopic pregnancy
  • Dizziness, fainting, or collapse alongside bleeding or pain

If you have any of these symptoms, call 999 or go to A&E immediately. Do not wait for a private scan.

For lighter bleeding or mild cramping without the above features, an early pregnancy scan at Sonoworld can confirm the location and viability of the pregnancy within 24–48 hours, providing reassurance or identifying the need for urgent onward referral.

What does an early pregnancy scan show?

An early pregnancy ultrasound scan at Sonoworld assesses:

  • Location of the pregnancy — confirming it is within the uterus (intrauterine) and excluding ectopic pregnancy
  • Fetal heartbeat — detectable from approximately 6 weeks gestation; a visible heartbeat is strongly reassuring
  • Gestational age — measured by crown-rump length (CRL)
  • Number of embryos — confirming singleton or multiple pregnancy
  • Uterus and ovaries — identifying subchorionic haematoma, ovarian cysts, or other pelvic pathology

The scan is performed transabdominally (probe on the abdomen) and, if needed for a clearer view in early pregnancy, transvaginally (internal probe). The transvaginal approach is safe in pregnancy and provides significantly better image quality before 8–10 weeks.

What if the scan is reassuring?

If a fetal heartbeat is confirmed at 6–8 weeks gestation, the risk of miscarriage drops significantly — to approximately 5% in women without a history of recurrent miscarriage. A reassuring scan does not guarantee the pregnancy will continue, but it provides meaningful and evidence-based reassurance.

Your sonographer will explain the findings in full at the end of the scan and provide a written report within 24 hours.

From Our Practice

Early pregnancy bleeding is one of the most emotionally charged presentations we see. Patients often arrive having been told by NHS 111 to "monitor at home" and call back if the bleeding gets heavier. For many women, the uncertainty of not knowing whether their pregnancy is viable is more distressing than any clinical outcome. An early pregnancy scan at Sonoworld provides an answer — either reassurance that the heartbeat is present and the pregnancy is progressing, or a clear clinical picture that allows the patient and their GP to plan next steps without delay.

Frequently asked questions

Is an early pregnancy scan safe?

Yes. Diagnostic ultrasound uses sound waves, not radiation, and has an excellent safety record in pregnancy. It is the recommended investigation for early pregnancy complications and is routinely used in NHS early pregnancy assessment units (EPAUs).

How early can a heartbeat be seen on ultrasound?

A fetal heartbeat is typically visible from approximately 6 weeks gestation on transvaginal ultrasound. Before 6 weeks, the embryo may be too small to visualise clearly, and a repeat scan in 1–2 weeks may be recommended.

Do I need a GP referral?

No. You can book directly at Sonoworld. If your scan identifies a finding that requires urgent management (such as a suspected ectopic pregnancy), the report will include a clear recommendation for immediate onward referral.

What is the difference between an early pregnancy scan and a dating scan?

An early pregnancy scan is performed before 12 weeks to confirm viability and location. A dating scan is performed at 10–14 weeks to confirm gestational age and estimated due date. If you are having an early pregnancy scan for reassurance, it can also provide a dating measurement if gestation is sufficient.

Sonoworld is registered with the Care Quality Commission (CQC). Our sonographers are registered with HCPC and are members of BMUS. All scans are performed at our Marylebone clinic: 29 Weymouth Street, London W1G 7DB.

Book Your Early Pregnancy Scan at Sonoworld

Same-day and next-day appointments available at our Marylebone clinic. Instant verbal results. Written report within 24 hours. No GP referral required.

Price: £235

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Or call us on 020 7486 1991

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