Hormone replacement and TSH tests

[Lilly12255]

Does anyone knows if taking artificial hormones would affect the thyroid functions or the the blood test or both?

As I am doing IVF, I am taking high doses of FSH and LH and I am wondering how it affects my Thyroid blood test results (TSH, T4 and FT3).

Thank you!

[radd]

Lilly12255

Hypothyroidism decreases levels of serum FSH & LH, ie high TSH, low gonadotropins.

Because you are medicating thyroid hormone your TSH will be controlled by your dosage with the aim of keeping it below 2.5 mIU/L.

[tattybogle]

I don't know anything about IVF , but i found a research study the other day. so in case this is relevant to your question......here is the reply i wrote for someone else who asked about IVF and altered TSH/fT4/3 levels ;"My levels were all pretty stable last few years and was only after starting IVF they have changed. ?

The following study seems to say that it is to be expected that Controlled Ovarian Hyperstimulation (COH) may reduce fT4 and increase TSH (and fT3 and Total T4)

Is this COH what you have had done as part of your IVF ?

ncbi.nlm.nih.gov/pmc/articl... In Vitro Fertilization Pregnancy Rates in Levothyroxine-Treated Women With Hypothyroidism Compared to Women Without Thyroid Dysfunction Disorders

Bert Scoccia,corresponding author Habibe Demir, Yuna Kang, Michelle A. Fierro, and Nicola J. Winston

"infertility treatment, including controlled ovarian hyperstimulation (COH) and/or IVF. The impact of ovarian stimulation on thyroid function was first investigated by Muller and co-workers (15), who found decreased fT4 levels in women undergoing COH, whereas estradiol (E2), TSH, thyroxine-binding globulin (TBG), total triiodotyronine (T3), and total T4 levels increased. Similar effects of COH on thyroid function in IVF have been documented in women without thyroid disease (16,17) "

This is the post my reply is taken from:

healthunlocked.com/thyroidu...