One-fourth of all women in the United States of childbearing age have been sterilized, so the remaining three-fourths come out to 10,000 (or 15,000).

I saw this statistic. What it actually said was this: Of women who use birth control 27% rely on female sterilization for birth control. and 9.2% of women who use birth control rely on the vasectomy of their partners. This is not 25% of all women of child-bearing age. The study was done on couples using birth control.

Only half of assailants penetrate her body and/or deposit sperm in her vagina,(1) so let's cut the remaining figures in half. This gives us numbers of 5,000 (or 7,500). Fifteen percent of men are sterile, that drops that figure to 4,250 (or 6,375). Fifteen percent of non-surgically sterilized women are naturally sterile. That reduces the number to 3,600 (or 5,400). Another fifteen percent are on the pill and/or already pregnant. That reduces the number to 3,070 (or 4,600).

The one footnote for all these "statistics" was from a study done in 1977 Where do the rest of the claims come from?

Perhaps there's a fact-checker here. It looks like the opposite is true.