I just want to add something to my post from yesterday. As much as I can be exhausted, I will say that "mommy exhaustion" doesn't come close to "infertility exhaustion." Now, I imagine this depends on how long your infertility lasts and the temperament of your baby.
BUT, from my personal experience, even though you may still be sleeping 8 hours a night when dealing with infertility, the emotional, physical and mental exhaustion is on a completely different level. So, if you're dealing with infertility and you're waiting for parenthood, when you get there, the exhaustion is totally worth it and is filled with countless blessings! =)