HCG and TSH have a similar structure. HCG can act as TSH and increase thyroid hormones. That happened to me. It is more common is very high dosages but might happen in smaller dosages. However I dont think it would increase TSH lab values.
I use 200/250 daily and have for 7 month straight now.. I must also add if I use 400iu daily for say 3d I run around like a buzzy bee and then crash. I did this about 9days ago I guess I should of waiting a bit longer or even not pin any HCG for 4/45 days to see results.