http://puttinggodfirstplace.com/2011/05/how-to-celebrate-mothers-day-even-when-it-is-hard.html (from the perspective of someone dealing with infertility)
http://www.terilynneu.com/2011/05/for-the-mothers-all-of-them-2/ (written by a mom who is incredibly sensitive to the Mother's Day needs of all kinds of women, including those dealing with infertility and loss)