[kittiepryde]

I've seen it as, 80% of women pass on their genes, but only 40% of men. (I assume that's no longer true today)

[smallnamespace]

There is still a gender gap, but it's less extreme (on a percentage basis) now:

By age 40, 85% of women had had a birth, and 76% of men had fathered a child

https://www.cdc.gov/nchs/data/nhsr/nhsr051.pdf