All the women would be built like Amazons
This one dates back to 1950, when a writer for the Smithsonian Magazine suggested that all the women of tomorrow would be more than “6 feet tall, wear a size 11 shoe, have shoulders like a wrestler, and muscles like a truck driver.”
Due to science providing a balanced ration of vitamins, proteins and minerals, women would have the most efficient bodies and be positively Amazonian.
This one is actually pretty truthful, minus that part about ALL women.