I already gave that example. Take out all the paid leave that females get, and they will be on close to double that of men.
For example: Man gets 50,000 per year, for 2500 hours. Woman gets 45,000 per year, but only works 1000 hours, because she is on maternity leave for 6 months, then works shorter hours because she needs to leave early to look after the baby.
A superficial glance would indicate the woman is paid less, but the real rate of pay of the man is $20/h, while the real rate of the woman is $45/h. She gets more than double what he does. Even if she returns to work at the same rate of pay and works the same hours as the man (which would be an unusual expectation on a mother), she still will be ahead up to 6 years later. And that's if she only takes 6 months paid leave. More leave = more benefit.
This doesn't take into account that in many higher-paid jobs, the top performing men are more productive (on a time basis) than most (not all) women, although its also likely true that the worst performing men are less productive (on a time basis) than most women.