"May we be zocheh to hear b’soros tovos b’korov!" [May we merit to hear good news soon]. (source)

"B'sorot tovot ~ May we hear only good news" (source).

"Besoros tovos translates as “good news,” but in our community, within the confines of a mikvah, it refers to a specific kind of good news: a pregnancy" (source).

"we should hear only besorot tovot from each other" (source)