What are the reasons why women quit breastfeeding  

My wife experienced some health problems when our daughter was about 4 months old that required her to take a medication that couldn't be taken when she was nursing. That's why she had to quit.

I stopped because my children were draining me dry every time they nursed. I couldent make enough to satisify them.

I breastfed my son until he was about 12 months and my twins until they were about 6 months - son I stopped cause he was ready - girls I stopped cause it got too hard :-)

I know some though either stop early or never really start because they realise that it can hurt for a little while, some for medical reasons, I know of some who found it didn't suit their lifestyle eg couldn't drink alchohol or because they went to work and couldn't feed there etc. And some just found it easier to use a bottle (I was of the opposite opinion - I always thought it was easier to breastfeed)

i wanred to stop to breastfeed my 11 months old because he keep on biting my nipple and it's really hurts.

I havn't breastfed yet (will this summer!) but here are a list of the reasons why people have told me that they quit:

Didn't produce enough milk
Child couldn't get a good latch
Too difficult/No support
Nipples bled and cracked
Child not gaining weight
Doctor pushed formula
Family pushed formula
Formula "easier" than pumping when going back to work
Didn't know the benefits
Child bit/chewed
Wanted their body back
Didn't like how it felt
Husband/boyfriend wanted to help feed baby
Husband/boyfriend didn't like the idea
Unsure if baby was getting enough to eat
Kept getting thrush
Tired of leaking
"Health reasons"

My biggest problem with breastfeeding was twofold. For one, I was a single mother with an infant and a two and half year old. It was nearly impossible for me to find a clean, safe, private place to nurse my baby. It was absolutely impossible for me to schedule feedings so that I was able to be at home for all of them. The second issue that I had was too much milk. My son had reflux, so he nursed every 1-2 hrs and would then vomit most of the feeding. When he was nursing, both sides would let down, I had to keep a folded bathtowel under the breast that was not in use to catch all the milk. Because of this and the frequent feedings, I wound up uncomforably engorged 24/7, unable to leave the house without 5 or 6 pads inside my bra to catch the leaks.

I'm a firm believer that breastfeeding is not for everyone because of my experiences.