Ecgwynn Good luck with that! 
I seriously can't begin to narrow it down to less than... well, about 30! There is only one I actually dislike (number 38 Leilani Rogers Photography) because it looks so staged (may not be, just looks it!) and I don't believe for a moment that the first image is a birth one... Her legs beneath the baby are firmly pressed against each other, and baby/water look remarkably clean.
But the looks of absolute joy/ecstasy/ relief on some of the womens' faces, the looks of wonderment from birth partners, it's all just so incredibly moving and I can't choose. No, I can't - don't make me!