I have this from a respected source many years ago but don't know if it's 100% true. Apparently it is highly classified information (if true) & could cost my source, at best his pension & at worse his liberty. It is a story I have used many times whenever the subject of M/F equality rears it's ugly head.
Kara Hultgreen was the first female to certify for carrier based combat flight.
It is considered that the single most difficult thing a human can achieve, is to land an armed fast jet on a carrier at night in bad weather, as if doing it in glorious sunshine was easy ! Please don't confuse this with those things we do that have a low chance of success, or things that require perfectly controlled conditions.
Kara Hultgreen got there, not because she was the token female at a time when pressure was on to let females take part, she got there because she scored very highly in most of the stages on the path. She was in the top 10% of people who by their very achievements are in the top 1% of human ability.
She was a card carrying member of 'The Yacht Club', they don't hand them out like Smarties.
Kara died after crashing on approach to a carrier landing shortly after she qualified. (I won't go into detail because the facts surrounding this are well documented on the net). This caused the whole controversial subject of female combat pilots to raise it's ugly head. (Again, the facts are well documented).
Part of that controversy was the examination into the mistakes she had made . . . I hope I don't have to explain to you how those mistakes are so thoroughly examined at each stage on this particular career path. The mistakes she made are well documented & form part of the synopsis of the investigation into her death.
What they won't tell you, the bit that is classified 'Top Secret' & can get so many people into trouble in so many different ways . . . Is that when her medical records were matched to her performance (as a pilot) chart, there appeared a clear link to her poor performance & her menstrual cycle.