Maternity benefits excluded for daughters --never occurred to me

I learned something new today from Kaiser Health News:

Employer health plans routinely cover pregnancy costs for workers and their spouses—but not necessarily daughters. According to a handful of new complaints filed with the federal government, that's sex discrimination, and the Affordable Care Act doesn't allow it.

I never really thought about it before, but I would have guessed that benefits for dependents would have been the same as for the employee and spouse. The National Women's Law Center has filed a lawsuit and although I'm no lawyer I think they may have a point.I can see how this issue would be even more prominent under Obamacare, which allows dependents to stay on their parents' plans until age 26.I wonder if there are other benefits that are different for dependents vs. worker and spouse.