For all of humankind’s history, men have been rivals for the favors of women, and a huge part of that competition (at least in the biological sense) has been to foster the birth and survival of their own offspring. If you believe in natural selection—and I do—that struggle for progeny has favored the growth of certain characteristics in men, ones that are more likely to lead to what we might euphemistically and archaically call the spreading of their seed.
Now a relatively new phenomenon, artificial insemination by sperm donor, may end up skewing the situation at least a little bit (more if current trends continue). At the very least, it has led to some potential problems for the offspring involved. The strange fact is that there are no legal limits in the US on the number of women who can be impregnated by one donor, and some donors have racked up some rather high numbers.
This article mentions one donor who is known to have been the biological father of 150 living children. That’s a sobering thought, especially when you consider that the donor does not know who his children are and has nothing whatsoever to do with them. And for the children themselves it poses some conundrums, not the least of which is that they face a possibility of meeting their own half-siblings and falling in love with and even marrying and having children with them, without knowing they are so closely related to their own spouses.
One way to reduce this problem is to legally limit the number of children a sperm donor can father. But this would only affect the future; it’s of no assistance to the children who are already alive. Some of them have already been helped by the establishment of donor registries to connect donor families. This has had the added benefit of sharing information about inherited diseases and the like. It also has a strange but understandable side-effect:
Today there are 150 children, all conceived with sperm from one donor, in this group of half siblings, and more are on the way. “It’s wild when we see them all together ”” they all look alike,” said Ms. Daily, 48, a social worker in the Washington area who sometimes vacations with other families in her son’s group.
Ah brave new world, that has such people in it!

