Hank Greely, a Stanford law professor who specializes in issues surrounding biomedical technologies and authored The End of Sex, a 2016 book that predicted humans will eventually reproduce mainly through IVF, told Fortune screening for cosmetic traits like hair, eye, and skin color or nose shape isn’t far off.

People in Silicon Valley, where Greely lives,are most interested in influencing their offspring’s intelligence, personality, musical and sports ability, and proficiency in math. Right now those are areas scientists “know almost nothing about,” he said.