The reality
In August 2002, the British Medical Journal published an article on domestic violence, where it asserted that around one quarter of women in the UK have been physically assaulted by a current or former male partner (BMJ, vol. 325, pl.317).
Commonly quoted figures are that two women are killed every week by their partner or ex-partner; that an incident of domestic violence is reported to the police every six seconds, but only an estimated 2% of incidents are ever reported to the police.
It is actually notoriously difficult to get accurate statistics regarding a problem which by definition goes on behind closed doors. Certainly some radical feminist groups have hijacked the domestic violence issue, and grossly exaggerated the statistics.