Heavy Periods and Abnormal Bleeding: When Should You Have a Pelvic Ultrasound?
Heavy menstrual bleeding and abnormal uterine bleeding are common reasons for gynaecological assessment. Pelvic ultrasound can help identify structural causes such as fibroids, polyps, adenomyosis, ovarian cysts, endometrial thickening and pelvic masses.
When should heavy periods or abnormal bleeding have a pelvic ultrasound?
A pelvic ultrasound is often recommended when heavy periods, bleeding between periods, prolonged bleeding, irregular cycles or pelvic pain suggest a structural cause. Ultrasound can assess fibroids, endometrial polyps, adenomyosis features, ovarian cysts, endometrial thickening, polycystic ovarian morphology and pelvic masses. Urgent medical review is needed for extremely heavy bleeding, dizziness, fainting, severe weakness, shortness of breath, significant pelvic pain, suspected pregnancy with bleeding or any bleeding after menopause.
What is considered a normal period?
Cycle patterns vary, but a typical cycle is often around 21–35 days and bleeding usually lasts up to 7 days. Bleeding becomes clinically significant when it affects physical, emotional, social or professional life.
Bleeding longer than 7 days
Prolonged bleeding may be associated with fibroids, polyps, adenomyosis, hormonal causes or endometrial changes.
Very heavy flow
Changing sanitary protection every hour for several hours, flooding, large clots or double protection may indicate heavy menstrual bleeding.
Quality of life matters
Heavy bleeding should be taken seriously if it affects sleep, work, daily activities, social life or causes symptoms of iron deficiency.
What is abnormal uterine bleeding?
Abnormal uterine bleeding, or AUB, means bleeding that differs from the expected pattern in frequency, regularity, duration or volume. It may occur during reproductive years, perimenopause or after menopause.
AUB may include
- Bleeding between periods.
- Spotting after sexual intercourse.
- Periods lasting longer than 7 days.
- Cycles shorter than 21 days or longer than 35 days.
- Unpredictable or irregular bleeding.
- Bleeding after menopause.
Why assessment matters
- Heavy bleeding can lead to iron deficiency or anaemia.
- Structural causes may be treatable.
- Pregnancy-related causes must be excluded where relevant.
- Postmenopausal bleeding needs prompt medical review.
Common causes of heavy periods and abnormal bleeding
Abnormal bleeding can have structural, hormonal, pregnancy-related, medication-related or systemic causes. The FIGO PALM–COEIN framework is commonly used to classify causes of abnormal uterine bleeding.
Fibroids
Fibroids are non-cancerous growths in the uterine muscle. Submucosal or cavity-distorting fibroids are more likely to cause heavy bleeding.
Endometrial polyps
Polyps can cause heavy periods, bleeding between periods or postmenopausal bleeding and may need hysteroscopic assessment.
Adenomyosis
Adenomyosis occurs when endometrial-type tissue grows into the uterine muscle and may cause heavy painful periods.
Ovulatory disorders
PCOS, thyroid disease, stress, weight change, perimenopause and hormonal disruption can cause irregular or prolonged bleeding.
Pregnancy-related bleeding
Pregnancy testing is important in reproductive-age women with abnormal bleeding, especially with pain or delayed periods.
Hyperplasia or cancer
Persistent bleeding, postmenopausal bleeding or risk factors such as obesity and diabetes may require endometrial assessment.
What can a pelvic ultrasound detect?
Pelvic ultrasound provides images of the uterus, endometrium, cervix, ovaries and surrounding pelvic structures. It is commonly used as a first-line imaging test when structural causes of heavy bleeding or abnormal bleeding are suspected.
| Ultrasound finding | Why it matters | Possible next step |
|---|---|---|
| Fibroids | Number, size and location help determine whether fibroids may explain heavy bleeding or pressure symptoms. | GP or gynaecology review, medical treatment, follow-up or procedural options. |
| Endometrial polyps | May cause intermenstrual bleeding, heavy periods or postmenopausal bleeding. | Hysteroscopy or specialist assessment may be needed. |
| Adenomyosis features | May explain heavy painful periods and an enlarged tender uterus. | Clinical correlation, medical management or gynaecology review. |
| Ovarian cysts or masses | May be related to pain, irregular bleeding or incidental pelvic findings. | Follow-up ultrasound, blood tests, MRI or specialist review depending on features. |
| Endometrial thickening | Important in postmenopausal bleeding and selected abnormal bleeding pathways. | Biopsy, hysteroscopy or urgent referral may be recommended. |
When should abnormal bleeding be urgent?
Many causes of abnormal bleeding are not emergencies, but some symptoms require prompt or urgent medical review.
Flooding or pad changes every hour
Extremely heavy bleeding, large clots, dizziness, fainting, severe weakness or shortness of breath can indicate significant blood loss or anaemia.
Bleeding with significant pain
Bleeding with severe pelvic pain, suspected pregnancy, shoulder-tip pain or feeling faint may require urgent assessment.
Private pelvic ultrasound for heavy periods and abnormal bleeding in Harley Street, London
London Private Ultrasound provides private pelvic and transvaginal ultrasound at 27 Welbeck Street, London W1G 8EN, in the Harley Street medical district. The scan can assess the uterus, endometrium, ovaries and pelvic structures to help identify potential causes of heavy bleeding or abnormal uterine bleeding.
Patients commonly travel from Marylebone, Mayfair, Fitzrovia, Soho, Bond Street, Oxford Circus, Baker Street and across Greater London for private women’s health ultrasound appointments.
What happens after a pelvic ultrasound?
The next step depends on symptoms, ultrasound findings, blood loss, pregnancy status, age and whether you are premenopausal, perimenopausal or postmenopausal.
Reassuring but not the whole picture
A normal scan may be reassuring, but hormonal causes, bleeding disorders or medication-related causes may still need blood tests or clinical review.
Fibroid, polyp or adenomyosis
Structural findings may explain symptoms and guide GP or gynaecology management options.
Biopsy, hysteroscopy or MRI
Further tests may be recommended if the endometrium is thickened, a polyp is suspected, symptoms persist or risk factors are present.
Read next: heavy bleeding, pelvic ultrasound and women’s health pages
These links help patients move from information about heavy periods and abnormal bleeding to relevant London Private Ultrasound services.
Heavy periods and abnormal bleeding — FAQs
Can ultrasound find the cause of heavy periods?
Ultrasound can identify many structural causes, including fibroids, polyps, adenomyosis features, ovarian cysts, endometrial thickening and pelvic masses. Hormonal and blood-related causes may need blood tests or clinical assessment.
Do I need a transvaginal ultrasound?
Transvaginal ultrasound often provides the clearest view of the endometrium, uterus and ovaries. It is only performed with consent. A transabdominal scan may also be used.
Can heavy bleeding cause anaemia?
Yes. Heavy or prolonged periods can cause iron deficiency or anaemia, which may lead to fatigue, dizziness, shortness of breath or reduced exercise tolerance.
Can fibroids cause heavy periods?
Yes. Fibroids, particularly those close to or distorting the uterine cavity, can cause heavy or prolonged bleeding, clots and pelvic pressure.
Should bleeding after menopause be scanned?
Any bleeding after menopause should be medically assessed. Pelvic ultrasound is often used to measure endometrial thickness and assess the uterus and ovaries.
Article preparation and clinical review
This patient information article was prepared with AI-assisted editorial support and reviewed for clinical accuracy by Dr Pedram Aghaei and Dr Hosna Rashidi.
It is intended for general patient information only and does not replace consultation with a qualified healthcare professional, GP, gynaecologist or urgent care service.
Corrected safety note: this article concerns heavy periods and abnormal uterine bleeding, not breast symptoms. Seek urgent medical care for extremely heavy bleeding, fainting, severe weakness, shortness of breath, severe pelvic pain, suspected pregnancy with bleeding, or bleeding after menopause.
Book a private pelvic ultrasound in London
If you have heavy periods, bleeding between periods, pelvic pain with bleeding, irregular cycles or bleeding after menopause, a pelvic ultrasound can provide important information about the uterus, endometrium, ovaries and pelvis.