I think we're getting away from the original topic a little bit. I think this is more about the whole PMS problem, where some women get extremely irritable a week before their periods start. I would say I am one of those women, and on the more extreme end of the problem, so there's my bias in this.
I don't think there have been studies done on women in combat situations on this. Although I get extremely irritable and teary-eyed, and generally just want to hide in a hole for a few days out of the month, I don't see this as being a factor in serious situations. In extremely serious situations, I imagine adrenaline would overrule anything other hormonal changes make to someone's behavior. A person's overall personality is going to be a far better marker of their ability to handle tense situations. Although I feel like shit inside, on the outside, I'm only slightly more likely to call off social plans or say something nasty when I would have normally kept my mouth shut. You give a woman birth control, and these extremes shrink to almost nothing. And IMHO, all women who are out on duty should agree to being given birth control for many, many reasons. But that's an other discussion.