Short answer.. yes it can!

Pregnyl is basicallly synthetic HCG, the pregnancy hormone therefore HPTs will show a false positive as long as it is still in your system. Best to wait for a blood test.

I am on my first FSH cycle to induce Ovulation after CLomid didnt work for me (I have PCOS) and have just had my Pregnyl trigger on Tuesday morning.

Are you feeling affects from the trigger & any follow up support shots you may be having? because it is a pregnancy hormone you can feel pregnancy symptopms. I certainly am. SInce having the shot the next day i have felt naucious, had headaches, sore nipples and have a swolen abdomen (ovary area).