How does subclinical hypothyroidism impact fert... - Thyroid UK

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How does subclinical hypothyroidism impact fertility?

Nat2021 profile image
9 Replies

Hey! I have subclinical hypo and hashi (tpo 124) i have been on levo 3 months trying to get it under 2,

It was 3.3 - 4 weeks ago, 5.5 originally in January. My dose was upped to 75mg and i have another test in 2 weeks.

My Vit D was low end in January and i have been supplementing for almost 3 months.

B12 was also top end of 300 so also been taking b12 and b complex aswell as folate, selenium and lots of diet changes.

i ovulate each month confirmed by bbt and a blood test, how can this be stopping me getting pregnant if i am ovulating ?

I cant find anything online that explains other than it disrupts ovulation which isnt the problem for me so is it really this thats impacting my fertility?

I know nobody tell me what the problem is but i am trying to understand why all the research/info just states it impacts fertility through preventing ovulation (which isnt always the case)

Thanks

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Nat2021
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SlowDragon profile image
SlowDragonAdministrator

Bloods should be retested 6-8 weeks after each dose increase

When was dose increased to 75mcg

Which brand of levothyroxine are you currently taking

Have you had coeliac blood test done

If yes, Are you now on strictly gluten free diet

Have you had vitamin D, iron and ferritin levels tested recently

You probably don’t want to be taking vitamin B complex and separate folic acid/folate. B complex contains folate

B12 and folate are Goldilocks vitamins, you don’t want too little or too much

todaysparent.com/pregnancy/...

Suggest you get FULL thyroid and vitamin testing via Medichecks or Blue horizon 6-8 weeks after latest increase in levothyroxine

Always test thyroid levels early morning, ideally before 9am and last dose levothyroxine 24 hours before test

Nat2021 profile image
Nat2021 in reply to SlowDragon

Bloods should be retested 6-8 weeks after each dose increase

When was dose increased to 75mcg

Dose was increased 4 weeks ago - due another test in. 2 weeks

Which brand of levothyroxine are you currently taking

Northstar

Have you had coeliac blood test done

No

If yes, Are you now on strictly gluten free diet

Have you had vitamin D, iron and ferritin levels tested recently

Not since January

You probably don’t want to be taking vitamin B complex and separate folic acid/folate. B complex contains folate

B12 and folate are Goldilocks vitamins, you don’t want too little or too much

todaysparent.com/pregnancy/...

Suggest you get FULL thyroid and vitamin testing via Medichecks or Blue horizon 6-8 weeks after latest increase in levothyroxine

I am going to do this in the next 2 weeks

Always test thyroid levels early morning, ideally before 9am and last dose levothyroxine 24 hours before test

I do this

SlowDragon profile image
SlowDragonAdministrator in reply to Nat2021

Northstar 25mcg is Teva

Northstar 50mcg and 100mcg are Accord

Accord also boxed as Almus via Boots

Accord don’t make 25mcg tablets

Are you cutting 50mcg tablets to get 25mcg to add to 50mcg to get 75mcg per day

GP should test for coeliac (if you’re not already on strictly gluten free diet)

nice.org.uk/guidance/ng20/c...

1.1 Recognition of coeliac disease

1.1.1 Offer serological testing for coeliac disease to:

people with any of the following:

persistent unexplained abdominal or gastrointestinal symptoms

faltering growth

prolonged fatigue

unexpected weight loss

severe or persistent mouth ulcers

unexplained iron, vitamin B12 or folate deficiency

type 1 diabetes, at diagnosis

autoimmune thyroid disease, at diagnosis

irritable bowel syndrome (in adults)

first‑degree relatives of people with coeliac disease.

Nat2021 profile image
Nat2021 in reply to SlowDragon

But how does all this impact fertility when i am ovulating regularly? I am confident i am not celiac as i don't have any of the symptoms

SlowDragon profile image
SlowDragonAdministrator in reply to Nat2021

You don’t need any obvious gut issues at all to still find gluten free diet reduces symptoms and many, many Hashimoto’s patients find it slowly reduces TPO antibodies

Poor gut function with Hashimoto’s can lead leaky gut (literally holes in gut wall) this can cause food intolerances. Most common by far is gluten. Dairy is second most common.

According to Izabella Wentz the Thyroid Pharmacist approx 5% with Hashimoto's are coeliac, but a further 80% find gluten free diet helps, sometimes significantly. Either due to direct gluten intolerance (no test available) or due to leaky gut and gluten causing molecular mimicry (see Amy Myers link)

Changing to a strictly gluten free diet may help reduce symptoms, help gut heal

Before considering trial on gluten free diet get coeliac blood test done FIRST just to rule it out

lloydspharmacy.com/products...

If you test positive for coeliac, will need to remain on gluten rich diet until endoscopy (officially 6 weeks wait)

If result is negative can consider trialing strictly gluten free diet for 3-6 months. Likely to see benefits. Can take many months for brain fog to lift.

If no obvious improvement, reintroduce gluten see if symptoms get worse.

chriskresser.com/the-gluten...

amymyersmd.com/2018/04/3-re...

thyroidpharmacist.com/artic...

drknews.com/changing-your-d...

restartmed.com/hashimotos-g...

Non Coeliac Gluten sensitivity (NCGS) and autoimmune disease

ncbi.nlm.nih.gov/pubmed/296...

The predominance of Hashimoto thyroiditis represents an interesting finding, since it has been indirectly confirmed by an Italian study, showing that autoimmune thyroid disease is a risk factor for the evolution towards NCGS in a group of patients with minimal duodenal inflammation. On these bases, an autoimmune stigma in NCGS is strongly supported

ncbi.nlm.nih.gov/pubmed/300...

The obtained results suggest that the gluten-free diet may bring clinical benefits to women with autoimmune thyroid disease

nuclmed.gr/wp/wp-content/up...

In summary, whereas it is not yet clear whether a gluten free diet can prevent autoimmune diseases, it is worth mentioning that HT patients with or without CD benefit from a diet low in gluten as far as the progression and the potential disease complications are concerned

restartmed.com/hashimotos-g...

Despite the fact that 5-10% of patients have Celiac disease, in my experience and in the experience of many other physicians, at least 80% + of patients with Hashimoto's who go gluten-free notice a reduction in their symptoms almost immediately.

humanbean profile image
humanbean

I think this is important for any woman with subclinical hypothyroidism who gets pregnant :

Title : Maternal Subclinical Hypothyroidism Associated With Higher Risk of Pre-Eclampsia

Link : endocrinologyadvisor.com/ho...

The article was posted on 29/3/2022 so it is very recent.

humanbean profile image
humanbean in reply to humanbean

Title : Plasma Selenium Predictive of Thyroid Dysfunction in Postpartum Women

Link : endocrinologyadvisor.com/ho...

The article was posted 6/7/2021

radd profile image
radd

Nat2021,

You can ovulate and not get pregnant due to reasons such as PCOS or low sperm count, but if you've only been medicating Levo for 3 months then hormones and system axes are more likely still levelling.

The complex hormonal interplay usually allows scope of small variations in healthy women but for those who have experienced larger deficiencies/elevations there’s a journey back to a normalised communication with the pituitary gland. Also long term hormonal imbalance can result in issues such as loss of progesterone receptor site sensitivity for example, or follicle sensitivity to FSH, just as thyroid hormone levels represent only blood levels and not cellular which could be deficient.

If TSH rises with corresponding prolactin then levels of much needed LH for egg release can become suppressed, which also discourages the high progesterone levels required to prepare the uterus lining for the fertilised egg. You also need enough FSH to secrete enough oestrogen in a negative feedback loop so the egg can be implanted, whilst too much oestrogen risks elevated TBG binding too much thyroid hormone and that TSH rising again.

Also regarding Hashimotos, there are members who say thyroid antibodies don’t matter because they are only there to mop up mess created by prolific WBC’s attacking the thyroid gland, but their presence makes many unwanted changes in our body, namely inflammation. Because of the further immune changes naturally instigated in pregnancy or even by our monthly 28 day cycle, this Hashi inflammation can become troublesome and even influence conception and retention of pregnancy by elevating TH cells (helper cells in first line defence).

Therefore, you need to be patient as hormones & system axes readjust back to normalised patterns which can take many months, whilst keep building good nutrient/iron levels and reducing bodily inflammation (elevated thyroid antibodies). And keep positive as you have made some amazing changes so far. You just need everything to respond rightly to that wanted falling TSH.

Good luck 🤞

.

T Helper (Th) Cell Profiles in Pregnancy and Recurrent Pregnancy Losses: Th1/Th2/Th9/Th17/Th22/Tfh Cells

healthunlocked.com/thyroidu...

.

Changes in the Th1 : Th2 Cytokine Bias in Pregnancy and the Effects of the Anti-Inflammatory cytokines.

hindawi.com/journals/mi/201...

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