My guess would be with the stigma of an unwed mother all but gone in the U.S. coupled with the unending social services provided them they are keeping the babies and raising them as single mothers. Single mothers are pretty much raised on a pedestal and treated like heroes these days.
Yeah, whenever I hear or see some media story where the first thing out of the woman's mouth is, "I'm a single mom and..."
That's the cue where everyone is supposed to go awe, poor abused person, no doubt wronged by some insensitive male...
But whether abortion or the single women keeping kids, or an overall declining birthrate, that's what I'd like to know.