Well.. my step sister and her biological mom were both pregnant at the same time. They gave birth 2 days apart. The Duggar's have children about the same age as their grandchildren..
so that blows their scientific theory right out of the water... lol!
and nope.. *I* have no desire to have an infant at my age (47 tomorrow). HOWEVER.. I've had my kids. If I had none and really wanted one.. I guess I'd feel differently.
My cousin got pregnant at 45. My SIL had a lot to say about it.. but I told her.. that cousin had the right to have a child if she and her dh wanted one. It wasn't my business. I was happy for them. That baby is 2 y/o now and they don't regret her for a moment.