I am 31 weeks pregnant with #2 and have just in the last week or so started to consider waterbirth as an option. I delivered #1 in a squatting position and ended up with what were probably 2nd degree tears. I am pretty fearful of tearing again, but I know that being in a vertical position is probably preferable for a quicker and easier labour. I do not want to give birth on my back and am not interested in giving birth on all fours.
The reason I had never considered water birth before is because under normal (not pregnant or in labour) circumstances I don't like having baths - having a bath just makes me want to have a shower, I find it gross - and thats in water free from amniotic fluids, blood, poop, etc! Also, I fainted after my first birth due to blood loss and low blodd pressure (my bp is kind of low normally to begin with), knowing I will have to get up and out of the water soon after birth worries me a bit - I don't want to faint on my way down the steps!
On the other hand, I know how well the water will support my body - how I will feel comparitively weightless and assume to water will soften my skin up a bit, reducing the chances of tearing (of course, being a 2nd pregnancy, my chances of tearing a slightly lower anyway).
I guess I just have to decide whether the pros outweigh the cons (and take into account the unknowns) and discuss it with my midwife.
I guess I really just wanted to voice my thoughts and concerns out loud, but if anyone has any feedback, I'd love to hear it