Trying to figure out something.

So I have a question for all you ladys. My question is I'm beginning to think that the preseed is bad news for trying to conceive, due to the fact you end up miscarry in or a etopic pr2gnancy. I have talked with 5 women that have used it and they all ended up miscarry in in the first trimester. Verus women that got pregnant without it. The women that got pregnant without it are in their second trimester with no miscarriage. One that had a etopic pregnancy used preseed too. I wonder what the science is behind it. I mean if you think about it using the lubricant is pushing the sperm up and forcing it to good where it needs to go than naturally. Weather it's a good sperm or not. I used preseed last time and I miscarried in dec. I was almost 12 weeks. Anyone else lost a baby using it or havent. What are your thoughts on it.