Thyroid UK
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Bashimotos and pregnancy

Hi. I have had thyroid issues for over 20 years and after a private blood test find I have Hashimotos. I don't know how long I have had this condition. My brother has recently had a sub thyroidectomy due to a goitre.

My daughter has had 5 miscarriages, last one being ectopic. Tests haven't found a cause. Should she go to doctors and ask to be tested for Hashis?

5 Replies


Hashimoto's causes 90% of hypothyroidism.

Your daughter should certainly ask for her thyroid levels to be checked. The risk of miscarriage increases when TSH is >2.5. Ideally TSH in pregnant women should be in the low-normal range 0.4-2.0 with FT4 in the upper range.


I am not a medical professional and this information is not intended to be a substitute for medical advice from your own doctor. Please check with your personal physician before applying any of these suggestions.

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In addition to having thyroid levels checked I would also ask for her B12 to be tested as when low this is also implicated in miscarriage. At the same time also check - Ferritin - Folate - VitD as they will all need to be optimal rather than bumping along the bottom of the range .....

There is an excellent book - Could it Be B12 ? - by Sally Pacholok where she talks about B12 and Pregnancy. Also about good B12 levels for children to enhance their development. Great book - every home should have a copy of the updated Second Edition :-)


Don't just get TSH, you must ask for both thyroid antibodies to be tested


Thanks everyone for your responses. My daughter is going to see her doctor to see if he will test for Hashimotos and also the vitamins and iron. If he doesn't agree then we'll go to Blue Horizon and get it done privately. Just wish I'd known about this earlier, I could have saved her a lot of heartache.

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I think this is a very good idea.

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