Beatrice,
A local gal became pregnant while on maintenance Herceptin and continued her treatment and pregnancy - I believe her oncologist consulted with Genentech and she may have been the first (or among the first known) people to have a successful pregnancy while on Herceptin. The baby arrived a little early, but from what I understand is doing great. Check out "Ask Stephanie Spielman" on
www.Jamesline.com. Good luck.
Kitty