No one has mentioned this here, so I thought I would. Some medications dry up milk supply. This is what happened to my mom when she was nursing me - they weren't supportive of nursing back then, or very informed, and the doc gave her a prescription that caused this problem when I was 3 months old. It wasn't until I was an adult, helping my sister with her newborn that I stumbled accross the reason why my mom was unable to nurse me. She had always just thought she was unable. So, if you're on any meds, ask the pharmacist about this possible side-effect.

Sorry I'm late, but here are two of my two cent thoughts. . .

First, the first time I started breastfeeding, I initially had some difficulty (this baby doesn't know what she's doing!)-and a nurse told me that more than half of the women who start, stop within weeks because it's so strangely difficult (and I had always heard it was natural). For some of us, those first few weeks can be frightening, which leads me to my other two cent thought. . .I had one that got terribly frustrated and I couldn't seem to produce enough for a while--to make things better, my then husband started screaming at me "you're going to kill her! She needs to eat!" --jerk. She's quite well now, I didn't kill her, but I did find that the idea I had about she needs all she can get, let her eat was contributing to the problem. When the baby is constantly taking just an ounce here and an ounce there, the baby is training your body to think that it only needs to produce an ounce at a time. Though it was horrible, I had to make her wait a little, and cry a little (baby cries stimulate milk production), so I could build up a little. Not all at once, just a few extra minutes each feeding until production increased, which it rapidly did.