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.


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. I was diagnosed with hashimotos and hypothyroid after the birth of my first child. I have a provider monitoring my thyroid with Levothyroxine and NP Thyroid, but I’ve still had 2 miscarriages, one at 6 weeks and one at 11.2 weeks. At this point, I’m at a loss for what to do because my thyroid is supposedly under control. Is it worth seeing someone who specializes in pregnancy thyroid?

  2. 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…

  3. 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

  4. 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.

    • My name is Jovana I had a miscarriage 2019 and this year of last week I was 8 in a half and I keep telling my husband I believe is my thyroid medication 200 I am going to talk to my doctor on Monday about this do you think that is to high I had two miscarriage back to back not good

  5. 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.

  6. Thank you for this article! I was pregnant for the first time and unfortunately miscarried in October. My doctor was monitoring my tsh levels before and cleared us to start tying. My tsh when we first found out I was pregnant was 1.5 so my doctor kept my dosage the same and when I got tested a month later, it went up to a 5. My doctor informed me via an emailing stating “you’re not optimal for pregnancy” even though she knew I was already 9 weeks at that point. I miscarried 4 days later. My doctor assured me that my tsh had nothing to do with my m/c and that my levels increased so drastically because my fetus “wasn’t healthy”. You get to the point where you don’t know who to believe. I will be doing a ton of research before my next pregnancy. This truly helped, thank you!

  7. I have had 2 miscarriages….one after my son was born in 2000 at 8 weeks and the other after I had my daughter in 2007, also at 8 weeks. I had no idea at the time why this happened. I knew I had an undiagnosed autoimmune issue going on, but never had a diagnosis. After my 2nd miscarriage, I was advised that if I wanted to try again, it was recommended that I have genetic counseling. I decided that after my 2nd miscarriage that I didn’t think I could handle another failed pregnancy and that I should feel blessed that I have 2 healthy children. Fast forward a few years when I was struggling with extreme fatigue and other hypothyroid symptoms that I was put on synthyroid even though my TSH levels were normal. Even though I was taking medication, I still felt terrible and decided I needed to see an endocrinologist who immediately sent me to have an ultrasound and more blood work done. I was diagnosed with Hashimoto’s and ended up having to have a total thyroidectomy. After my surgery and the pathology came back, the report said they found cancer in it…follicular variant! I was very lucky that I ended up having it removed. I had no idea at the time that my thyroid issues could have and probably resulted in the loss of my 2 babies. Thank you for this article. I always tell people who ask me about my thyroid issues that if they aren’t getting the answers they seek from their doctor, to find another one that will listen.

    • Hi Cyndi, I”m sorry to hear all you’ve been through and an important story really of how your thyroid cancer was discovered. When something doesn’t feel right, it isn’t right. I have many Hypothyroid Mom readers here that read the comments and yours will remind them to get another medial opinion.

  8. I am currently 11w4d pregnant and my TSH levels are insane. I had them checked for the first time in my life when I was 8 weeks. They were 328! My doctor told me to go straight to emergency to be seen. Since then I have been on medication and my levels have now dropped to 124. So there’s an improvement. I have my 12 week scan on Monday and am soo nervous 😬

    • Sarah,

      I realize this is a very late reply but I am currently pregnant with my first and just had my TSH levels tested and they are through the roof. I am absolutely terrified to find out what this means for my baby. I know I’m at in increased risk for a miscarriage or still birth or having a baby with neurological or developmental issues which is also terrifying…

      What ended up happening with your pregnancy?? Were you able to deliver a healthy baby in the end??

  9. I had a miscarriage on August 1st at 6 weeks. My re did not want to test my tsh because she had just changed my dose a few weeks before I found out I was pregnant. So we waited two weeks and by the time they tested my tsh it was 18. Less then a week later I miscarried. I kept telling them I knew they were high because I was feeling awful. Next time I will trust my gut and just go to my family Dr right away if my ob or re won’t test them.

  10. Thank you so much for sharing this with us women who are looking to conceive. Though a thyroid issue isn’t present now doesn’t mean that during pregnancy it can not show up so I LOVE your blog. I am one who suffered 2 missed miscarriages due to my thyroid. I had no idea I even had a thyroid problem till I had testing done at 7 weeks pregnant during my second pregnancy, I didn’t began treatment till my 8th week but it was already too late. It traumatized me so bad that currently I am expecting and I am still nervous and shook from my experience. Nonetheless I believe it’s very important to seek treatment right away. Thank you so much for sharing.

  11. I am just coming across this article in a search fueled by PURE RAGE. I have had two losses this year, both at 8 weeks, both with a slow heart rate and underdeveloped fetus. My next step was to find a Reproductive Endo and as a Type 1 diabetic with Hashimoto’s who sees an endocrinologist every 3 months with blood testing at least yearly, my assumption was that I would have known if there was an issue that could cause me harm or to lose a baby. Just for my reference, I decided to call my diabetes endo today and ask for the last TSH level so I could be prepared when making an appointment with an RE. To my SHOCK, they have not run TSH tests during any of my bloodwork since 2015!!!! THREE YEARS!!! and at that time, my level was 3.84, which would have been a contributing factor to a miscarriage three years ago! I can’t even imagine what my levels are now in 2018 and I’m simply enraged.

    Thank you for this article and for sharing your story. I am praying to find answers in the coming weeks.

    • Oh wow. I am so sorry to hear about your losses. They really should have been testing your TSH especially after the second loss. I hope things get figured out and taken care of.

  12. Also, with ALL 4 of my pregnancies/miscarriages , I have had slow rising HCG. My step sister and other family member took hcg injections and they no longer miscarried. I asked my Reproductive endo about this and she said hcg is a reflection of the health of the baby and taking Injections wouldnt make an unhealthy embreyo healthy again..
    I’m wanting another opinion on this . Bc after reading Marc Ryan’s post about how it creates a strong corpus luteam , and these ladies success stories , it sounds like it would help…
    Any knowledge in this ?

  13. I have had 4 back to back miscarriages with unexplained causes. All super early. 7.5,6.5,4.5, 4 weeks . I had monitored my tsh and t4 . Prior to my 2nd miscarriage my primary put me on T3 bc it was low but 2 weeks after that my thyroid endocrinologist took me off of liothironine bc she said in pregnancy you only go off of tsh bc the baby only uses t4 or sees t4, if I took t3 it could give a False view of your overall tsh: I sometimes still wonder about this. If I have low t3, could this be causing my miscarriages ?

  14. I have just suffered a miscarriage as well and I was diagnosed with postpartum thyroiditis after the birth of my son 2 years ago and I can’t help but wonder if my hypothyroid had anything to do with my miscarriage. My TSH levels were well below 2.5 so I don’t really know. I am grateful for your honesty and desire to help other women!

  15. I miscarried right before Thanksgiving and it absolutely broke my heart. I have two beautiful healthy children but I decided to get my thyroid checked and recently they found a nodule. I will have a biopsy Friday. I can’t help but think there was something I could’ve done. Im glad I googled this because I’m trying to lose weight and it’s not happening! Like at all! Thank you for writing this book!

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