Total fertility rate
This is what experts know so far about how family history plays a role in getting pregnant.
Who gets access to fertility specialists in the U.S. says a lot about who we think "deserves" a family.
Everyone agrees they should start trying for a baby before it gets hard. But, as shown by a recent survey, no one knows when that is.
New figures bear out a looming demographic crisis in Europe. Not since the Black Death have we seen populations collapse like this.