Initial investigations + treatment for heavy menstrual bleeding in primary care?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 10 June 2026Updated: 10 June 2026 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

Initial investigations for heavy menstrual bleeding (HMB) in primary care:

  • Take a detailed clinical history covering the nature of the bleeding, related symptoms (such as persistent intermenstrual bleeding, pelvic pain, or pressure), impact on quality of life, comorbidities, previous treatment, contraceptive use, and cervical screening history ,.
  • Consider physical examination if there are related symptoms suggestive of uterine abnormalities or systemic disease; include abdominal and bimanual pelvic examination, including speculum, except in young non-sexually active girls ,.
  • Perform a full blood count for all women presenting with HMB to assess for iron deficiency anaemia ,.
  • Carry out other investigations as guided by history and examination, including pregnancy test if menstrual pattern deviates, vaginal/cervical swabs if infection suspected, thyroid function tests if hypothyroid features present, and coagulation tests in women with lifelong HMB and personal/family history of coagulation disorders .
  • Routine serum ferritin or female hormone and thyroid hormone testing is not recommended unless clinically indicated ,.
  • If history and examination suggest low risk of uterine pathology (fibroids, adenomyosis, endometrial abnormality), pharmacological treatment may be started without further investigation ,.
  • If history and examination suggest high risk of submucosal fibroids, polyps, or endometrial pathology, refer for outpatient hysteroscopy; alternatives include referral for hysteroscopy under anaesthesia or pelvic ultrasound if hysteroscopy declined ,.
  • For suspected larger fibroids (≥3 cm), pelvic ultrasound is recommended to guide further management ,.
  • Transvaginal ultrasound is preferred if adenomyosis suspected based on significant dysmenorrhoea or bulky tender uterus on examination; transabdominal ultrasound or MRI considered if transvaginal is declined or unsuitable ,.

Treatment options in primary care for HMB:

  • For women with no identified pathology, fibroids less than 3 cm not distorting the uterine cavity, or suspected/diagnosed adenomyosis, offer the levonorgestrel-releasing intrauterine system (LNG-IUS) as first-line treatment ,.
  • If LNG-IUS is declined or unsuitable, consider pharmacological options including tranexamic acid, nonsteroidal anti-inflammatory drugs (NSAIDs), combined hormonal contraception, or cyclical oral progestogens ,.
  • Progestogen-only contraception may be beneficial due to possible menstrual suppression .
  • If immediate pharmacological treatment is needed while awaiting specialist referral, tranexamic acid and/or NSAIDs should be offered .
  • Women should be informed about treatment effects, such as anticipated changes in bleeding pattern with LNG-IUS and the need to wait several cycles to assess benefit .
  • Referral to specialist care is warranted if treatment fails, if severe symptoms persist, or if there is a pelvic mass suspicious for malignancy or other serious pathology ,.

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Educational content only. Always verify information and use clinical judgement.