Back when we were trying to get Heather pregnant, it seemed like the answer to that question was "Immediately!" No particular time frame; just "now." It's like those sitcom episodes where the new parents are asked by condescending fellow parents in play group what preschools they've applied to and are met with scorn when they say they haven't applied at all. That's how we felt, early on, when we wanted to get pregnant and hadn't taken morning temperatures or used fertility lenses. What in holy hell is a fertility lens?