The NFL has no gender-specific eligibility requirements. Anyone good enough to play NFL-level football can play.
The NHL is the same.
The NBA is the same, and women have been invited to training camps in the past, but none were able to perform well enough at the game to play in the NBA.
Women were banned from the MLB in 1952, but that was overturned in the 1990s, but no woman has been able to perform well enough to play in the MLB. Melissa Mayeux did make the international registration list for the MLB though, making her eligible to sign with an MLB team.
There are sports where women can be generally equal to men in performance (ultramarathon running) or generally better than men (target shooting), but they are less popular and less lucrative sports.
The NFL has no gender-specific eligibility requirements. Anyone good enough to play NFL-level football can play.
The NHL is the same.
The NBA is the same, and women have been invited to training camps in the past, but none were able to perform well enough at the game to play in the NBA.
Women were banned from the MLB in 1952, but that was overturned in the 1990s, but no woman has been able to perform well enough to play in the MLB. Melissa Mayeux did make the international registration list for the MLB though, making her eligible to sign with an MLB team.
There are sports where women can be generally equal to men in performance (ultramarathon running) or generally better than men (target shooting), but they are less popular and less lucrative sports.