they donated sperm to a lady to inseminate her, she had the kids and then just handed them over to the dads forever, for a sum of cash.
The woman who carried/delivered the baby(s) wasn't inseminated. She was just the surrogate. (oven for the buns!)
The egg donors were chosen (also paid handsomely), eggs harvested, inseminated with one guy's sperm and then put in the oven.
That's why, under Californian law, the surrogate has no rights to access etc whatsoever, as soon as the delivery is complete, as she is not related in any way at all to the baby(s).
Very good documentary… wouldn't recommend waxing a babies mono-brow though!