Have You Suffered a Miscarriage? Your Thyroid Could Be to Blame

Thyroid Miscarriage

On a cold snowy day in New York City in January 2009, I lay on a medical exam table on what would be one of the worst days of my life. I had miscarried at 12 weeks and was being prepared for a D&C, a surgical procedure to remove my baby. A technician had just taken an ultrasound and walked out of the room to reconfirm to the medical staff that my fetus had no heartbeat. I sprang off my bed and ran to the image on the screen. I felt my body shake and my fists clench as I stared at the image of my unborn child. From a place deep in my soul came a wail.

What happened to my child?

I was diagnosed with hypothyroidism, an underactive thyroid, the year following the birth of my first son in 2006. I struggled day to day with a fatigue that hit me like an avalanche of bricks. I trusted my doctors and followed their thyroid drug protocol to the letter never once thinking they might not know everything there was to know about hypothyroidism. I trusted them as the experts especially when I became pregnant that second time.

I would later learn that my Ivy League medical school trained and top awarded doctors in New York City did not know enough about hypothyroidism, especially the dangers of hypothyroidism and pregnancy. Under their care my TSH (thyroid stimulating hormone), the gold standard for measuring thyroid function in mainstream medicine, reached levels far above the pregnancy recommended reference range and endangered my baby’s life.

What Can Cause A Miscarriage – Hypothyroidism And Pregnancy

A study presented June 2012 at The Endocrine Society’s 94th Annual Meeting in Houston recommended that all pregnant women should undergo thyroid screening in the first trimester of pregnancy. The study was conducted on 1,000 pregnant women in their first trimester in Ludhiana in Punjab, India. According to the study’s lead author Jubbin Jagan Jacob, M.D.:[1]

 “The study found that even mild thyroid dysfunction could greatly increase the risk of serious problems. Women with mild thyroid dysfunction had double the risk of miscarriage, premature labor or low birth weight as compared to pregnant women with normal thyroid function. They also had seven times greater risk of still birth.”

In the Journal of Medical Screening, researchers in a large study of 9,400 pregnant women demonstrated that pregnant women with hypothyroidism had a second trimester miscarriage risk four times the risk of women who were not hypothyroid.[2]

According to a 2008 study in the Indian Journal of Medical Sciences, hypothyroidism has a statistically significant relationship with recurrent pregnancy loss in the first trimester. According to researchers:[3]

“Thyroid hormones are essential for the growth and metabolism of the growing fetus. Early in pregnancy the mother supplies her fetus with thyroid hormones. If the mother is hypothyroid, she cannot supply her fetus with enough thyroid hormones. Hence hypothyroidism is a risk factor for pregnancy loss.”

The 2007 Endocrine Society’s clinical guidelines for the Management of Thyroid Dysfunction during Pregnancy and Postpartum includes the following recommendations:[4]

  • If hypothyroidism has been diagnosed before pregnancy, thyroid hormone replacement medication dosage should be adjusted to reach a TSH level not higher than 2.5 mIU/L prior to pregnancy.
  • If overt hypothyroidism is diagnosed during pregnancy, thyroid function tests should be normalized as rapidly as possible to TSH levels of less than 2.5 mIU/L in the first trimester (or 3 mIU/L in the second and third trimester).”

Throughout my first trimester, my TSH remained higher than the above recommended 2.5 mIU/L, soaring close to 10.0 mIU/L. Despite my raging hypothyroidism symptoms, my doctor said that everything was fine and that TSH was only a concern in pregnancy above 10.0 mIU/L.

My doctor clearly never read the 2007 Endocrine Society clinical guidelines for pregnancy.

My doctor tried to assure me there was no link between hypothyroidism and miscarriage, but my instincts told me they were wrong.

I failed to listen to my instincts and I paid a heavy price.

As the medical staff prepared me for my D&C that fateful day, I vowed that I would do everything in my power to research everything there was to know about hypothyroidism and tell women everywhere.

You may wonder why I created Hypothyroid Mom.

Here I am a woman with zero blogging experience. I never used Twitter or Facebook ever before the start of Hypothyroid Mom. What in the world am I doing creating a blog?

Here’s the real reason I’ve created Hypothyroid Mom

pure rage.

That babies are being needlessly harmed from medical lack of awareness about thyroid disease is unacceptable.

I failed to protect my child and I have to live with that regret for the rest of my life.

I can’t go back in time and change things no matter how much I wish it.

What I can do is save babies all around the world,

in memory of my child.

I co-authored this book with Mary Shomon, Your Healthy Pregnancy with Thyroid Disease: A Guide to Fertility, Pregnancy, and Postpartum Wellness, so that every woman will know the lab tests, optimal ranges, medications, supplements, dietary recommendations and more so that she will know more than even her doctors about having miracle babies with thyroid disease.

Your Healthy Pregnancy with Thyroid Disease


1. Endocrine Society (2012, June 23). Mild thyroid dysfunction in early pregnancy linked to serious complications. Newswise. Retrieved July 3, 2012 from http://www.newswise.com/articles/mild-thyroid-dysfunction-in-early-pregnancy-linked-to-serious-complications.

2. Allan, W.C., J.E. Haddow, G.E. Palomaki, J.R. Williams, M.L. Mitchell, R.J. Hermos, J.D. Faix, R.Z. Klein. Maternal thyroid deficiency and pregnancy complications: implications for population screening. J Med Screen 2000; 7:127-130.

3. Rao VR, Lakshmi A, Sadhnani MD. Prevalence of hypothyroidism in recurrent pregnancy loss in first trimester. Indian J Med Sci 2008;62:357-61.

4. The Endocrine Society. Management of Thyroid Dysfunction During Pregnancy and Postpartum: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism 2007; 92(8)(Supplement):S1-S47.

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About Dana Trentini

Dana Trentini founded Hypothyroid Mom October 2012 in memory of the unborn baby she lost to hypothyroidism. This is for informational purposes only and should not be considered a substitute for consulting your physician regarding medical advice pertaining to your health. Hypothyroid Mom includes affiliate links including the Amazon Services LLC Associates Program.


  1. Desperate mom says

    I have had a miscarriage after 8 weeks of pregnancy, with a healthy boy prior to that. My third pregnancy went well, another healthy boy. Then, one year later, my next boy’s heartbeat stopped at 35 weeks of pregnancy and he was still born the following day. I was diagnosed with hashimoto’s and my doctors never paid attention to that during my pregnancies. I’m trying to find a reason why our son had to die so close before the due date and wonder if it was my thyroid disease…

  2. Amanda Russ says

    I found this too late. I just had my second miscarriage. I was diagnosed right before my first miscarriage. Not one person said it could have been because of hypothyroidism. My doctor said we would never know what caused the miscarriage. Then 2 weeks ago we found out again our babies died at 6 weeks. I mentioned to my doctor that I had heart palpitations. She wanted to test my thyroid levels. They were double where they were supposed to be. I looked back at my yearly check and they were much higher than normal for pregnancy. I was livid. Why didn’t she check those right away? Like when she checked my hcg. So like you I have researched everything I can to keep this from happening again.

    • I have just lost a 2nd child, I suffered our first miscarriage after our first daughter and now again after our second daughter. I checked myself out for coeliac disease early pregnancy and found out I had a high reading for tyriod. Everything was fine they said but my gut said different. 6 week scan went great, everything looked strong. Then at 8 week scan I was told it was a missed miscarriage. If only I knew more about this and demanded care for my thyroid levels I could still be carrying our baby

  3. I am 35 yrs old,have 3 kids and just miscarried at 11 weeks,hemorrhaged,had to have a blood transfusion,be life flighted,and had an emergency D&C. I have had Hypothyroidism for about 13 years. I have been at the same Endocrinologist clinic for about 9 years. I figured they would know that my levels were too high for pregnancy. 2 weeks before I miscarried, I was at my OB appt. She was very concerned that my babies heart beat was a little higher than normal and was very worried about my TSH level being at a 3.8 when it was supposed to be at a 2.5 or lower. I tried getting a hold of my Endocrinologist and my return message from them was them asking me what dose I was on, was I taking it in the a.m on an empty stomach ect. Like wtf, I’ve been doing this for how many years,been seen at the same clinic and your asking me these kind of questions. I was livid. Anyways,to make a long story short I am currently waiting to see a new endocrinologist to hopefully get answers. I am beyond upset, and am being my own advocate for my thyroid issue. Eventually hopefully I will get some answers and help with my Hypothyroidism.

  4. I am in so much pain. Physically, emotionally and mentally.
    I was gisnosed with underactive thyroid about 10 months ago after being told “borderline” for ages. I started taking meds on a Low dose and having bloods done every 8 weeks. In September I was put on the higher dose as my bloods would spike then go down so they thooyvht best to go higher. I fell pregnant end of October (wasn’t really trying) but soon fell in love with it all even though didn’t feel ready. I went to an early scan at 8/9 weeks and told missed miscarriage. I have been a mess for over a week and I did naturally miscarry Saturday. I have a hospital app in two hours to check all “gone”
    I had no idea could of been thyroid and now I am heartbroken this may happen again.
    Any reassurances I will be okay? And have healthy babies? I’m so scared to go through what I’ve gone through and I always wanted a big family.

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