THRESHOLD Episode 8 "Progeny"

Three women are identified as being infectees in the Washington DC area. The outbreak seems to be unconnected, but the team quickly locate a fertility clinic that has treated all the women. It seems that one of the crewmen from the original ship is providing infected sperm samples and creating alien babies. Life is complicated by the fact that one of the women is the wife of just about the biggest contributor to the President's election fund. Oh, and the new boss is poking around as well.