07/10/2025
It’s not always bad luck.
Sometimes “unexplained” just means not yet identified.
There are often underlying factors that routine tests miss — and the good news is, many can be found with the right investigations.
🧡 Thyroid issues – Even when thyroid results look ‘normal,’ raised thyroid antibodies (TPO) can increase miscarriage risk — yet they’re rarely checked routinely.
🧡 Low progesterone – A short luteal phase can affect implantation, but this is easy to test when you know your ovulation day.
🧡 Vitamin D deficiency – Common in the UK and linked with poorer fertility outcomes.
🧡 Microbiome imbalance – Certain bacteria can inflame the uterine lining, impacting implantation and early development.
🧡 Male factors – The male microbiome, oxidative stress, and DNA fragmentation can all influence conception and early pregnancy outcomes, yet are often overlooked.
Some of these tests are available through your GP, others privately, and thankfully, the science is moving faster than routine care.
If you’ve experienced two or more losses, please know there are ways to start getting answers now.
This isn’t an extensive list — just five areas that are often unexplored and relatively easy for you to test or advocate for yourself. Some are free through your GP, some are relatively low cost, and others may cost a little more. Depending on where you are on your journey, you’ll know what’s right for you.
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