After CAR T cell therapy, seven women had healthy newborns and five more were experiencing regular pregnancies as of late May, researchers report July 29 in the New England Journal of Medicine. CAR T cell therapy was pioneered as a treatment for cancer, but there are very few reports of pregnancy in those circumstances. The treatment involves engineering certain immune cells, called T cells, into destroyers of other immune cells, called B cells, which are attacking the body. All had undergone CAR T cell therapy for autoimmune diseases, largely for lupus, and all were in remission. In further testing of five of the newborns, the researchers found the expected immune cell allotments.