I am in the same situation... I am pregnant with our 2nd child now with a son who just turned one. This pregnancy was a 'surprise' and I have 2 sets of friends dealing with infertility. One have one daugter who's 3 and have been trying since she was born for a second child, and the other couple have been trying for a little over a year with no luck at all... and the girl in this relationship is desperate for a baby and gets depressed every month when it doesn't take.I haven't told either of them about our current pregnancy, as I'm only 6 weeks in, but for the last pregnancy I called them each seperately and said "I have some news that's going to be bittersweet for you, we're expecting. I know how badly you want a child, so I wanted to give you time to process the info privately, but I know you care about us and will be happy for us also."I feel this way they don't have to put on an act to your face, and they can get their emotions out of the way and come to terms on their own. If they are your friend, they are going to be happy for you, but at the same time, it hurts and reminds them of their own struggles. Hope this helps, and Congratulations on your pregnancy!