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A lot of people here seem to think that the form is just about answering when your last period was - but in fact, women are being required to give a full menstruation history, including dates of their last maternity leave. So, it's not about x-rays or date of your last period or anything like that.
Also, the BBC reports today that because of backlash, the form is now being re-evaluated.
Link: http://news.bbc.co.uk/2/hi/south_asia/6547909.stm