I donít know what to say other than, ďIím so sorry.Ē But I can tell you what you NEVER say is, ďDonít worry, there will be another baby,Ē or ANYTHING along those lines. This is because, First, you donít know that there will be another baby, and Second, another baby will not make up for the failure of this pregnancy. And Third, in this case, it would be wildly inappropriate given how you know them.
My momís best friend fed her this line after Momís third miscarriage. Mom subsequently didnít talk to that woman for 20 years. (Mom went on to have me and my younger brother, and then another three miscarriages, so although I was young, Iíve been aware of the reality of miscarriages my entire life. And I really think my mother should have become a sort of grief counselor for the fertility-challenged. If thatís a thing.)
Seriously. Stick to the "I'm sorry."