How do you get eggs in Pokemon Platinum?

First what I did, was I traded a murchrow at the GTS in Jublife City. I had a Staravia in the day care center, so I put my murchrow in with it. (You will need the day care checker app on your poke'tech from the man that sits in the chair in the day care center) What should happen, is every 2-5 minutes you shall find eggs in the middle of the 2 poke'mon I put in the day care center on the day care checker app.