Thyroid hormone levels are lowest on day 3 of our cycles so, some women opt for bloodwork at that time.

I didn't learn this until after I was stable at my optimal levels.

I do know that it's best to be consistent with the time of day you get your blood drawn....that way, you'll have a clear picture moving forward.

Hopefully, your doctor is monitoring your FreeT4 and FreeT3 levels.

Some people make sure to not take their levo for at least 8 hours before the draw - there doesn't seem to be any consistency with my research as to whether or not this is appropriate.

I take my levo at night so, this isn't an issue for me.

Glad you're feeling better - may it long continue!

I did a little more research and realized that the online thyroid textbook thyroidmanager.org mentions this:

"Serum T4 concentrations peak 2 to 4 hours after an oral dose and remain above normal for approximately 6 hours in patients receiving daily replacement therapy."

I would say it's best to take your level at least 8 hours before the draw or wait until after the draw to take it.

If I get my blood drawn on day 3 of my cycle and we have to increase the Levothroxine based on those numbers would it be too much medicine for other times of the month. It makes sense to increase when you are at your worst to avoid bad days. I take my medicine in the middle of the night so I will be fine with waiting 8 hours. Thanks for your help again cd3764. I would not be at this point without your help. I cant wait to see where my numbers are and share with you. I will be getting TSH, free t3 and free t4. Will also check my vitamin D again and vitamin B and folate.

Whether I was on ATD`s or Synthroid...I had my labs drawn at the same time of day under the same circumstances. I found for me...that gave me a true reading of where I was at and made my adjustments accordingly...Big Hugs...Kathy

Kaycar

25mcg is a common starting dose and is rarely a therapeutic dose.

You will most likely need many dose increases to restore wellness.

That said, I wouldn't worry about the day 3 of the cycle idea.

It's more important to get labs every 6 wks. (the amount of time it takes for things to stabilize after a dose adjustment).

It just doesn't make sense to me to miss an opportunity for a needed dose adjustment if lab timing doesn't work well with our cycles.

I just shared this with you because I know some women do this.

I'm glad you're getting all the right tests - you will surely benefit.

Thanks everyone for the advice. I am going today for bloodwork which is day 3 of my cycle and almost 7 weeks. Anxious to see the results. I will keep you posted.

Thanks everyone for the advice. I am going today for bloodwork which is day 3 of my cycle and almost 7 weeks. Anxious to see the results. I will keep you posted.

Thanks everyone for the advice. I am going today for bloodwork which is day 3 of my cycle and almost 7 weeks. Anxious to see the results. I will keep you posted.

I usually like to do by bloodwork closer to the date I meet my endo so he has recent activity of what is going on so usually 3 days prior to an endo visit also so the lab can send it to him

I think I read that tsh rises until 11:00 am then begins to decline after that,I always have had labs early in the morning and if I take replacement i don't take it till after.