Thyroid Disorders Community
26k Members
Avatar universal

menstrual cycle is late after RAI

I underwent RAI last monday, my period was due yesterday, when can I expect to get it.  I am supposed to start my next package of birth control pills on Sat (four days from now) should I start them even though I have not gotten my period?
2 Responses
698356 tn?1240154327
My gut tells me (but don't have any knowledge to back it up) that your body might have been shocked by the RAI and messed up your period. I always took my BC whether I had started a period or not (but I was taking it to regulate my periods anyways). Is it possible you are pregnant? If it is a possibility I wouldn't start until you had a negative test.
Avatar universal
My periods stopped long before I was diagnosed with Graves and Hyperthyroidism and I had RAI 6 months ago.
I went for hormone tests this week as I heard that thyroid disorders can cause fertility to drop and periods to cease or become irregular.
My results showed I am well gone past the menopause!
I am 48 years old and havent had a period since I was 43.I wont get any now either.
I have seen others post that they cannot fall pregnant because of the TSH being out of range (either hypo or hyper).
I would say the best thing to do would be a pregnancy test and if negative, see your Doctor as the RAI can do a lot of things to your body.
Chances are , your periods will resume to normal once your TSH does.
In regards to BC, I would ask your Doctor whether to take or not.
Have an Answer?
Top Thyroid Answerers
649848 tn?1534637300
Avatar universal
1756321 tn?1547098925
Queensland, Australia
Learn About Top Answerers
Didn't find the answer you were looking for?
Ask a question
Popular Resources
We tapped the CDC for information on what you need to know about radiation exposure
Endocrinologist Mark Lupo, MD, answers 10 questions about thyroid disorders and how to treat them
A list of national and international resources and hotlines to help connect you to needed health and medical services.
Here’s how your baby’s growing in your body each week.
These common ADD/ADHD myths could already be hurting your child
This article will tell you more about strength training at home, giving you some options that require little to no equipment.