More than women bringing about their own late abortions. Many are only prosecuted for the assault on the mum, as cold destruction is quite difficult to prove, but in reality, sentence will reflect the reasons for the assault and likely be elevated as a result.
But there are men in prison for the offence of chuld destruction. Asa Davison, who was given a life sentence for it, Nicholas Leaning, serving a sentence of 10 years for attempted child destruction and assault.
It does happen, perhaps not enough. You've got to price the baby was 28w+ gestation and intention to kill. So mum being beaten up and the baby dies isn't enough...
The victim of the oftener is the baby, not the mum. The offence reflects the seriousness of deliberate killing of a child of that gestation. If the offence is used more widely, then that would apply to women as much as men (it was the original offence this woman was prosecuted for).