It's possible that, as your baby's head moves deep down inside you, your bowels open in the water. Try not to worry about this. It's very common and your midwife will simply sieve out any debris to keep the water clean. The second stage may last for only a few pushes, or for much longer. Research suggests that it is faster if you are in a birthing pool.
Many women find that kneeling on all fours is a comfortable position to give birth in.
If you choose a semi-squat, supported by your birth companion, make sure your baby's head will be born completely underwater. As the birth approaches, your midwife will probably use a small mirror to see how much of your baby's head is visible. You and your birth companion might like to look as well. Once your baby's head has been born, relax until the next contraction brings with it the birth of your baby's body a few moments later. Your baby will sink in the pool after he is born.