They weren't kidding when they said every pregnancy was different! For each little manny I was given a much longer 'rag' respite. I think it was around the fifth/sixth month post natal - about the time the kids branched out from the breast and started scoffing cereal - when my period reared its ugly head.
One of the perks of breastfeeding is supposed to be an extended break from the blob, isn't it?