Mothers who harm their children are often identified in the media as "mum" whereas their male counterparts often receive the less emotive appellation "father", or simply "man". This is a trend I have noticed without compiling any data, so at this point my comments are merely anecdotal. But it would be an interesting study, along with surveying the vocabulary in biographies of violent crimes committed by parents against their own children. I am thinking particularly of the animosity elicited by Rose West, and Newcastle's Kathleen Folbigg, who was convicted of killing her four children.
Of course I may be just noticing those articles that present information in a certain way that arouses my ire, but it would be an interesting study nonetheless.
This is something I would like to follow up in the future. I hope this entry will serve as a reminder for me to do so.