http://www.enscript.com/pump

The above URL is to an entire site, listserv etc. that is dedicated to the
pumping mother, full and part time.  I, myself know of many women who pump to
supply all or most of their child's needs, it is not really that uncommon.
Among those of us that are affected by craniofacial anomalies (someone in the
family has an anomaly of this type) it is very common for moms to do this,
particularly for the child's first 3-4 months (typically the initial lip repair
is done about this time, and moms like to try to get them through that, at
least).
Vickie