Irregular Periods - Hormone Blood Tests
At Marylebone Diagnostic Centre, we provide in-clinic hormone blood testing to help identify hormonal patterns that may affect the menstrual cycle.
Hormone Testing for Irregular Periods
Irregular periods are a common reason women seek hormone testing.
Cycles may become unpredictable, heavier, lighter, or stop altogether.
At Marylebone Diagnostic Centre, we provide in-clinic hormone blood testing to help identify hormonal patterns that may affect the menstrual cycle.
Testing is laboratory-based and clinician-reviewed.
What Counts as Irregular Periods?
Irregular cycles may include:
- Missed periods
- Cycles shorter than 21 days or longer than 35 days
- Heavy or prolonged bleeding
- Spotting between periods
- Sudden cycle changes
- Periods stopping unexpectedly
Hormonal changes are a common cause, but not the only one.
Hormone Blood Tests Commonly Used
Testing for irregular periods may include:
Testing helps distinguish between hormonal imbalance, PCOS, thyroid issues, or cycle transition.
Female Hormones
- Oestradiol (E2)
- Progesterone
- LH (Luteinising Hormone)
- FSH (Follicle-Stimulating Hormone)
Androgens
- Testosterone
- SHBG
- DHEA-S
Supporting Tests
- Thyroid hormones (TSH, Free T3, Free T4)
- Prolactin
- Iron & Ferritin
Why Cycle Timing Matters
Hormone levels vary throughout the menstrual cycle. Accurate interpretation depends on:
- Cycle day at testing
- Recent cycle history
- Current symptoms
Incorrect timing can lead to misleading results.
In-Clinic vs At-Home Hormone Tests
Unlike online-only services, MDC offers in-clinic blood collection, same-day processing, and clinician-reviewed results.
This matters because:
- Finger-prick tests may not reflect true hormone levels
- Cycle timing can be considered
- Full hormone panels can be assessed together
Menstrual health requires accurate testing.
What Happens After Your Test?
- In-clinic blood draw
- Laboratory analysis
- Clinician review
- Clear explanation of results
- Guidance on next steps
Repeat testing may be recommended to monitor cycle changes.
When to Consider Hormone Testing for Period Changes
Testing may be helpful if:
- Cycles change suddenly
- Periods become irregular or stop
- Symptoms affect daily life
- Fertility is a concern
Blood testing supports informed decisions.
Book Hormone Testing for Irregular Periods
Get clarity on your cycle health with clinical blood diagnostics.
contact us73 Baker Street, London W1U 6RD
Monday–Saturday, 8:00–16:00
5-minute walk from Baker Street
+44 7495 970109
