3 ms·
I don't know why this was voted down. We've been performing in vitro fertilisation en masse since the 1980s. All of a sudden, men with non-motile sperm are fath
by bencollier49 6y ago
I don't know why this was voted down. We've been performing in vitro fertilisation en masse since the 1980s. All of a sudden, men with non-motile sperm are fathering children.
So as a single cause it's not that massive, but at 1% of all births, the effects will soon stack up.
- worker767424 6y agoAlso that reducing infant mortality rate and other early death rates means the weak ones live long enough to breed. Unlike IVF, this just stalls genetics. IVF actively selects for fertility issues.