Maternity leave is not a vacation. It takes time to physiologically recover from giving birth. Psychologically, new mothers need time to adapt to their new role. Between frequent feedings, diapers, sleepless nights, taking care of a newborn is a lot of work. Certainly there is no time for leisure so labeling maternity leave a vacation is disingenuous.

That being said, there should be a "leave" option for parents adopting children as well.