Yes, that's due to shutdown since 50 mg/week is lesser than what a healthy man will produce naturally.
100 Mg/week is my prescribed dosage and I do feel fine at that level which is about 550 ng/dl but I feel much better when I supplement my dosage up to 200 mg/week. It's not high enough where I feel I need to use an AI as my libido is raging and my aggression is noticeably higher too. If I went much higher I'd probably want to add in 0.25 mg of Adex every 3rd day or so. No hcg since I'm an old fart who's done having kids and I use the 29ga slin pins too, makes it a lot easier.