Doctor at fertility clinic uses his own sperm and is the father of over 300 kids.

Nazis using the dna of Hitler to create over 40 lil'Hitlers.

Doppelgangers. Clones.

Talk of military doing strange experiments on human/ human tissue.

Private, well funded, secret laboratories doing everything we ban in government/ world.

Jar babies of the rich pumping out Audrey Hepburn every 25 years to see if they get another Hollyweird cash cow.

Slave owners breeding slaves for the biggest, strongest field workers.

Arranged marriages of royalty, relegion, or race.