Dear Miss India,

It could be the reason. The thyroid produces a feminine hormone that is very important for the conception. I am not pretty sure how this hormone is called but I believe it is the Prolactine. Probably you`ll have to test the levels of your feminine hormones (it is a blood test and I have already made it). My problem was a low level of progesterone and I normalised it with the help of a herbal medicine called Vitex. I do not know if Vitex is sold in Netherlands but for sure you could find sth similar with an active component of the herb called VITEX AGNUS CAST. It helps normalizing the level of the three feminine hormones, does not have side effects and is recommended when unaible to conceive on hormonal basis. However you have to talk to your doctor about it but I am pretty sure he wouldn`t mind perscribing you that herbal pill.
Wishing you the best of luck and a sooner baby cry!