http://www.fathermag.com/authors/Carey_Roberts/003/column/articles/31773.shtml
In 2003, females, usually mothers, represented 58% of perpetrators of child abuse and neglect, with men composing the remaining cases. In that same year an estimated 1,500 children died of abuse or neglect. In 31% of those cases, the perpetrator was the mother acting alone, compared to 18% of fathers acting alone. [www.acf.dhhs.gov/programs/cb/pubs/cm03/index.htm]
Then theres the scandal of Dumpster babies. In 1998, 105 newborn infants were discovered abandoned in public places. One-third of those babies were found dead.