Dr. James Mydell is involved in an unfortunate incident of assisted reproduction. For one has to deal with extracting semen of a Bronze Age men recently found in a glacier. On the other, he have to help a couple of friends, the Cordell, solve their fertility problems. But carelessness causes an unexpected samples were confused and finally Elaine Cordell is inseminated with semen of prehistoric man.
Practical Effects
The caveman corpse prop deserves its own credit, honestly iconic
Writing
Whoever pitched 'caveman semen mix-up' and got it greenlit is a legend

Director
Jeffrey Reiner
Trivia, insights & behind the scenes
Director Jeffrey Reiner later directed 30 episodes of Friday Night Lights, proving everyone starts somewhere.
This aired on UPN in 1999, part of that glorious era when networks greenlit absolutely unhinged TV movies to fill dead air.