There's a difference between becoming pregnant naturally in one's later years, and manufacturing a child when one is physically too old to conceive.
Agreed--all but the last phrase. Again--what in the world does age have to do with it? If 60's the new 30, isn't age a bit too relative to use as determinant? 66 isn't even too old to ride a motor-cycle, ski, mountain-climb, marathon (not to mention shovel snow, take the garbage out, mow the lawn, SHOP!). She may have a rough time demonstrating tumbling moves or jump-shots; but I know a bunch of women who couldn't do that at ANY age.
I don't get your point. Age has a great deal to do with pregnancy. At some point, usually in the mid to late 40's, women reach menopause. After that, they are naturally infertile. Sometimes women become pregnant naturally in their 50's, but that's fairly rare.