While men have typically two or three times more upper body strength than women, their leg strength is comparable and women have proven more durable in feats of physical endurance. Women have slightly longer average lifespans than men, which results in women overtaking men in population by middle age despite a 1.05:1 boy to girl ratio at birth in the United States. This rate varies among countries. {{fact}} | While men have typically two or three times more upper body strength than women, their leg strength is comparable and women have proven more durable in feats of physical endurance. Women have slightly longer average lifespans than men, which results in women overtaking men in population by middle age despite a 1.05:1 boy to girl ratio at birth in the United States. This rate varies among countries. {{fact}} |