Bleeding After a Vaginal Ultrasound: Normal or Not?

A transvaginal ultrasound is a key part of early pregnancy care, giving your midwife or sonographer a clear view of your pregnancy sac and baby. It is perfectly safe and does not harm your baby. However, some women notice light spotting afterwards, which can be worrying if you were not expecting it. This guide explains why it happens and when to seek advice.

Why Scans Can Cause Spotting

The ultrasound probe is inserted into the vagina and sits close to your cervix. Because your cervix is engorged and sensitive in pregnancy, the gentle pressure of the probe can cause a small blood vessel to release a drop or two of blood. You might see pink or brown spotting when you wipe, usually within a few hours of the scan. It should settle within 24 hours.

Your cervix in early pregnancy has a much richer blood supply than usual. This is part of the normal physiological changes that begin straight away after conception, and it is why even a gentle internal examination or scan can produce a small amount of blood. It does not mean anything has gone wrong. The probe itself does not enter the womb, cannot touch the pregnancy sac, and cannot disturb the developing embryo or foetus in any way.

The spotting tends to be very light — often just a streak of pink or old brown blood on the tissue when you wipe, rather than a flow. Many women have no spotting at all. If you do notice it, try to keep calm. It is one of the most common questions asked by early pregnancy units.

What Normal Post-Scan Spotting Looks Like

Normal spotting after a transvaginal scan typically has the following characteristics:

Colour: pink or light brown (old blood), not bright red
Amount: very light — noticeable only when wiping, not filling a pad
Duration: settles within a few hours, almost always gone within 24 hours
Pain: little or none beyond what you already felt during the scan itself

If your spotting matches this description, you do not usually need to contact anyone, though you are always welcome to phone your early pregnancy unit for reassurance.

When to Call After a Scan

Light spotting that resolves within a day is normal. Contact your early pregnancy unit or midwife if any of the following apply:

The bleeding becomes heavy or fills a pad
The blood is bright red and shows no sign of settling
You experience significant pain, particularly one-sided pain in your lower abdomen
You develop a fever or feel unwell
The spotting is accompanied by large clots
The bleeding has not settled after 24 to 48 hours

These symptoms are not caused by the scan itself and need investigating regardless of how the scan went. An early pregnancy unit can assess you quickly, and in most cases the cause turns out to be something straightforward. If you cannot reach your midwife or early pregnancy unit and you are experiencing heavy bleeding with severe pain, call 111 for advice or 999 in an emergency.

If the scan showed a healthy heartbeat and you notice spotting afterwards, try to hold on to that information. The spotting is almost certainly cervical irritation — not a sign that the pregnancy has changed since the scan ended.

After Your Scan: Practical Steps

To minimise the chance of further irritation in the hours after a transvaginal scan:

Use a panty liner rather than a tampon, so you can monitor any blood loss
Avoid penetrative sex until any spotting has fully settled, usually 24 to 48 hours
Avoid strenuous exercise for the rest of the day
Drink plenty of water and rest if you feel anxious or unsettled

There is no need to restrict activity beyond the day of the scan if you feel well. Most women return to their normal routine immediately.

Frequently Asked Questions

How long can spotting last after a vaginal scan?

Usually a few hours to 24 hours. If spotting lasts longer than 48 hours, becomes heavier, or turns bright red, contact your early pregnancy unit for advice.

Can a transvaginal scan cause a miscarriage?

No. The probe does not enter the womb or touch the baby. It is completely safe in early pregnancy and is routinely used precisely because it gives the clearest view at an early stage. There is no evidence that a transvaginal scan causes or contributes to miscarriage.

Is it safe to have sex after a vaginal scan?

Yes, once any spotting has fully settled — usually after a day or two. It is sensible to wait until then to avoid further irritation to the cervix. If you have been told by your midwife or doctor to avoid sex for another reason, follow that advice.

Should I go to A&E if I bleed after a scan?

Not for light spotting. Phone your early pregnancy unit or call 111 first. A&E is appropriate if you experience heavy, uncontrolled bleeding or severe pain alongside bleeding.

Further reading:

NHS — Common pregnancy symptoms

This information is for educational purposes only and does not replace professional medical advice. Always contact your midwife, GP, or early pregnancy unit if you are concerned about any symptoms in pregnancy. In an emergency, call 999.