A newly filed civil case alleges a fertility doctor secretly substituted his own DNA during treatment, resulting in the births of two girls.
In the clip, Vance questioned Democrats -- including Harris, Transportation Secretary Pete Buttigieg and U.S. Rep. Alexandria Ocasio-Cortez -- for not having biological children.
"Mr. Vance, I pray that your daughter is fortunate enough to bear children of her own one day," Aniston wrote.
Meanwhile, births continued to shift to older mothers.
Alabama has a new law protecting in vitro fertilization providers from legal liability.
Republican Sen. Cindy Hyde-Smith of Mississippi blocked quick passage of a bill on Wednesday afternoon that would have enshrined protections for in vitro fertilization and for the doctors who perform the procedure.