Hi
I would say that if you are using the word validation in the context of female or male gender then I would say no. Almost all seem to know their gender before hand including myself. As far as confirmation goes I would say yes and here is why in a simple example. It is a guy example I know however it is appropriate, gets the point across and most people can relate to the analogy.
You have two types of fuel for your car gas (petrol) and diesel. If I put diesel in my gas car what happens?
It runs terrible, cantankerous, miss-fires, spits, is angry, upset and basically runs terrible. If I put gas back in what happens?
It smooths out and purrs like a kitten! Having the correct hormones allowed me and my body to run as it was intended to run and when you feel the difference you KNOW BIG TIME and it becomes clear. That is in effect what happened to me so it definitely confirmed I was doing what I needed to do!
Sorry for the guy analogy and I have scheduled myself for 1000 lashes but it works

All the best , good luck with your journey and I hope this helps some.