No where has ANYONE said that anything they say constitues medical advice, this includes your stop supplementing and start screwing your gf 'suggestion.' They are simply stating that there is a chance that supplements such as PLCAR may help with OP and his wife having a baby. They are even providing several studies that show what could be potential benefits of carnitine. And there's a funny thing behind the word may, it can also be followed by not. That's the way the cookie crumbles. In this world, even more so than in medicine, nothing is 100%
And then there's the issue of the well-being of the child. If carnitine has a potential impact on newborns then are you going to advise mommies and daddies to not eat any protein while trying to conceive?
Do I have a background in anything? No. Do I believe that there is evidence of the benefits of supplementation that isn't proven in a peer-reviewed studies? Yes.
If you get worked over a thread like this one then I'd be interested in your reaction to some of the other sections on this board, Steroid, PCT, and Male-anti aging to be specific.
To the OP, good luck bro. Keep us posted.
To blindluck, take some valerian and GABA and relax. If you believe in that stuff.