Name Withheld wrote:

Dear Rabbi,

I seem to remember that if you meet or find out that someone is pregnant, you're not supposed to wish them "mazal tov" and there is another phrase that you use instead. Could you tell me what that phrase is? PS Love the column!

Dear Name Withheld,

The phrase is "B'sha'a tova u'mutzlachat" which means "It should be at a good and propitious time." "Mazal Tov" is usually said upon hearing something joyous which has taken place. "B'sha'a tova u'mutzlachat" is usually said for an impending good, one which one hopes will happen, but which hasn't happened yet.