Does FSH test work while breastfeeding?

[Twopandemicpregnancies]

I think I may be going straight from postpartum to perimenopause. Initially I thought it was postpartum sweats but it has continued on much longer - never been more sweaty in my life. Want to check FSH levels but am wondering if breastfeeding and the associated hormones will render the test inaccurate?

Bump as would also like to know!

That's a good point - I started hrt when breastfeeding and had lots of meno symptoms. (But he was a toddler - I possibly wouldn't till over 6 months or 1 as it did reduce supply slightly.)

When I did some googling I found research that breastfeeding can keep the ovaries ticking over for longer (amh levels? ) but reduces oestrogen a bit. I don't know if that's therefore linked to fsh, though sounds like it might.

www.balance-menopause.com/menopause-library/breastfeeding-hrt/

The research I found showed no evidence of transdermal oestrogen entering milk supply.

s895428841.websitehome.co.uk/wp-content/uploads/2021/10/the-menopause-and-breastfeeding.pdf

www.drugs.com/breastfeeding/estradiol.html

It's also useful for pnd:
www.fertstertdialog.com/posts/18277-the-value-of-transdermal-estrogen-treatment-postpartum

@Raddyradiator you may find above links helpful