Pumping basically increases the breastmilk. <a style="text-decoration:none" href="http://app.babychakra.com/article/640"><b><font color="#3b5998">All you need to know about Pumping Breast Milk</font></b></a>

Affect you mean increase or decrease... If you are pumping regularly then it's good ... Like more you directly breastfeed more milk you produce same way if you are pumping regularly then it will be good