Preseed and Miscarriage

Louise • TTC#1
I've started using pressed ttc#1 this is our 5th cycle.
Sounds silly but since I've been using it, I've read more and more about it and seen lots of opinions about it possibly causing miscarriages. General feeling is it helps along sperm that wouldn't have otherwise made it.
Does anyone have any experience in BFP through Preseed or feeling they miscarried because of it?
Thanks xx