Here is how to improve supply:
-Feed as often as your baby wants; in newborns feeding on demand at this point will create an adequate supply (some say to have a baby moon and take care of baby only, have lots skin to skin contact)
-Don't use pacifiers and bottles, you need nipple stimulation to produce more milk
-Use breast compression. This is a technique that helps baby get more milk. It is squeezing breast while baby is feeding. When baby is still sucking but not swallowing put your thumb on one side and your other fingers on the other side of the breast. You should be holding a big part of your breast in your hand, bring your thumb and fingers together and compress the breast. More info:
http://www.thebirthden.com/Newman.html (look for a link on breast compression).
-Use herbs known for increasing milk supply (you should consult your health provider before) such as Fenugreek and Blessed Thistle, they are can be found in health food stores, they usually come in capsules, take both 3 times a day 1-3 capsules (depends on what your bottle says). They can increase your supply within 24 hours but they don't always work.
-Some drugs are known to have a side effect that increases your supply. Such is Domperidone, you should ask your physician if she could prescribe it for you
-Pump your milk
-Have a lot of rest, eat good food and drink a lot of water or juices. Sufficient liquid intake is very important and often tired and sleep deprived new moms forget to drink. Keep a glass of water by your side when you nurse. Usually, in first weeks your thirst can be paramount which is good, it reminds you to keep drinking.
I hope this helps, let us know how things are going
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