The Supplemental Nursing System (SNS) by Medela and
the
Lact-Aid allow you to feed formula through a tube while you breastfeed.
I have only used the SNS, and found it frustrating, although other mothers love it. This article by an adoptive mom compares the two and speaks highly of the Lact-Aid.
Domperidone
is the top prescription drug recommended in Canada for increasing breastmilk.
In the U.S. it is only available at compounding pharmacies (find one near you using this
the website).
Goat's Rue is thought to increase glandular tissue.
Supporting Mothers With Mammary Hypoplasia (Diana Cassar-Uhl, 2009) This article discusses how to recognize hypoplasia, theories on causes, and how to support mothers with the condition.