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Underactive Thyroid
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Questions in the Thyroid forum are answered by Mark Lupo, MD. Topics covered include Goiter, Graves Disease, Hyperthyroid, Parathyroid/Calcium Problems, Thyroid Cancer, Thyroid Nodules/Cysts, Thyroiditis, Thyroid & Pregnancy, Thyroid Stimulating Hormone (TSH), Thyroid Tests, and Thyroid Surgery.

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Underactive Thyroid

Can an underactive thyroid cause you to miss your period?  I'm almost 2 weeks late and have taken 3 pregnancy tests all coming back negative.  Is this possible?  A doctor in the emergency room told me in January that I had a slight underactive thyroid and that I needed to go to my doctor and get it treated.  I never did that and haven't got it treated.  Is it possible that it has gotten worse?  I had a normal period in January and February, so I don't know what is going on.  Any thoughts?  Thank you
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97953_tn?1193367871
A low thyroid can cause menstrual irregularities -- would follow-up with repeat thyroid labs to see if you need thyroid treatment.
7 Comments
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Avatar_n_tn
I have hypothyroidism....usually I'm exactly on time but when my thyroid is off It comes either earlier or later and at times I bleed for a lot longer...it definitely effects my menstrual cycle...thyroid is nothing to play around with, I would get yourself checked if you were told it was underactive...
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Avatar_n_tn
when i was hypothyroid (underactive), i was on the pill but my periods were short (like 2 days) and really light. although the doctor told me that if you're underactive your periods are sposed to get heavier and longer - but i think that might only be if you're majorly underactive - and i was only a little bit (although it felt awful!!!) compared to others. but then again everyone's body does different things!
so maybe it could be caused by underactive thyroid.
you should definately get tested for hypothyroidism - dont let it get so bad that you get so sick you cant do anything and have to quit your job coz your so sick like i did (although it was my doctors fault not mine!)
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Avatar_n_tn
my irregular periods were the only reason I had a blood test, which showed me to be borderline hypothyroid (TSH 8.9, FT4 0.76) . they were totally bizarre, stopping entirely from jan06-april06. then i went to the doctor who laughed it off and said 'take birth control'.  so i did, and got them every 28 days exactly, although were very light and short, then stopped taking birth control in november. I had one normal length and volume period in january, and nothing since then. got these hypo blood results just last week, and not sure if they are going to prescribe me anything, as my followup appointment is next week.
as for other symptoms, i am less motivated and less able to concentrate than usual but i'm careful to not attribute that to my thyroid, because i think that makes it easy to excuse myself becoming a lazy bum.  but that's just me.  my point here is that the thyroid seems to do a crazy variety of things to people; in my case, it messed with my cycle but not much else.  
i think ultimately one should go to the doctor and listen to what she or he says about it. and in my opinion, for what it's worth, stay away from websites like stopthyroidmadness.com which seems to have its own bizarre armourphilic agenda and therefore i'd be nervous about their medical information about thyroid disorders.
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Avatar_n_tn
ghk, with a tsh of 8.9 you should really try taking thyroxine! (i think it's called levoxyll or synthroid over there), and the normal levels of tsh are 0.3 - 3, so 8.9 is really quite high.
you're not a lazy bum - the lack of concentration and no motivation is a symptom of hypothyroidism. you will find that with treatment both of these will improve.
i thought many of my symptoms were normal too - because i'd been sick for so long i'd just gotten used to it.
i'm not sure what my tsh was when i was really low (i was tested during a hashimotos attack), but i was hardly eating anything or i'd put on weight. not sure if you're the same? (although i was so used to it i thought i was eating a normal amount). thyroxine would help this a lot too.
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Avatar_n_tn
i am Hypothyroid and i am on Synthroid 0.088mg, i cannot tell you about periods
as i have PCOS, so sometimes i don't get my period

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Martina
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Avatar_n_tn
I have hypothyroidism and my period is always late.Before this my period was always 28 days apart...now they are very irregular...
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