Irregular Periods & Hormone Imbalance – When to Get Tested
By Tharb Faisl
If your periods are unpredictable, prolonged, or missing altogether – it’s not something to ignore. Irregular menstrual cycles can be a sign of deeper hormonal imbalances, such as PCOS, thyroid dysfunction, or low progesterone.
At Marylebone Diagnostic Centre in Baker Street, we regularly help women from across Harley Street, Paddington, Kings Cross, and Central London identify the root cause with accurate hormone testing – often in just one visit.
“I thought stress was the reason my cycle was off. But it turned out to be low progesterone. I wish I’d tested sooner.” – A real Marylebone patient
Book Your Hormones Tests Today!
When to Consider Testing
You may benefit from a hormone test if you experience:
- Cycles shorter than 21 days or longer than 35 days
- Missed periods (amenorrhea)
- Spotting between periods
- Heavy or light bleeding
- Severe PMS, mood swings, or fatigue
- Acne or excess hair growth
- Difficulty conceiving
These symptoms may point to:
- Polycystic Ovary Syndrome (PCOS)
- Low oestrogen or progesterone
- High testosterone or prolactin
- Thyroid dysfunction (overactive or underactive)
Our Female Hormone Profile
Our blood test is specifically designed to investigate hormonal causes of cycle changes.
Tests included:
- Luteinising Hormone (LH)
- Follicle-Stimulating Hormone (FSH)
- Oestradiol (E2)
- Progesterone
- Prolactin
- Testosterone
- Sex Hormone Binding Globulin (SHBG)
Add-ons available:
- Thyroid Function (TSH, Free T4, Free T3)
- Lipid Profile (Cholesterol, HDL, LDL, Triglycerides)
- eGFR (Kidney function estimate)
- AMH (Anti-Müllerian Hormone – ovarian reserve)
When to Take the Test
For most accurate results:
- Book between days 2–5 of your cycle (for LH, FSH, oestradiol)
- Progesterone is ideally measured on day 21 of a typical 28-day cycle
- If your periods are irregular or absent, our team will advise the best timing
Location & Booking
We’re located at: Marylebone Diagnostic Centre
73 Baker Street, London, W1U 6RD
Near Harley Street, Kings Cross, Euston, Paddington, and all of Central London.
Same-day appointments available. Walk-ins welcome. No GP referral needed.
Female Hormone Profile – Only £99
Lab analysis, and explanation of results. Add-on tests available.
FAQs
Book Your Hormone Test Today
Stop guessing. Get real answers about your cycle, hormones, and fertility.
📞 Call/WhatsApp: +44 7495 970109
🔗 www.marylebonediagnosticcentre.com
📍 Visit us: 73 Baker Street, London, W1U 6RD