The most important birthing skill to master is breathing. Breathing is an involuntary, instinctual function that we can learn to control. If you can learn to breathe, you can learn to relax, to open, and to slow your heart rate. If you can learn to control your breath you can learn to control your endorphins. If you can harness the power of your breathing instincts, you can harness the power of your birthing instincts.