Just that really. Told my Line Manager that I'm pregnant, and he congratulated me, to which I thanked him. He then asked me if it was planned or not.
I felt super weird but politely answered as I didn't know what else to say. I've since told my colleague (who is also pregnant), and she said he asked her the same thing when she told him.
My boss and I have a strictly professional relationship, we're not friends and don't go into detail about our private lives with eachother.
Am I bring ridiculous to think this inappropriate?