Your clock is ticking

So I have to ask, how many times have you heard the "you better hurry up your clock is ticking?" Or "you know you aren't getting any younger" when people ask you when you are going to have a baby? I'm 30 and I have been married just under one year and people make that comment to me on just about a monthly basis. And the worst part is I hear it from my In laws the most. Don't people understand that just puts more pressure on an already stressful situation?