Should Transgendered women be allowed to compete against biological female athletes

I personally do not think that this would be professional in anyway at all. I'm not trying to be offensive in any shape or form but I do think that once you're born a Male you're a Male for life no matter what you have done to your body. Transgenders should not be given full access to what women have access to as they've already been given access to use the same toilets as women which I think is kinda crazy but would seem strange for a Transgender to use a Male rest room anyways lol. There's loads of ways you could look at things like this but I do not think it would be fair to let Transgenders compete against Female athletes no matter what.