I disagree with this, there is very little difficulty for Women these days. I would say woman can do whatever they want, when they want. Its very old fashioned to say women have difficulties these days.
LOL, good one! 
... Oh, you're serious, are you? 
Bless...
Back on topic: the ethnicity boxes are a mess. Sometimes they mean skin colour, sometimes they mean culture (yours, or your ancestors'), sometimes they mean genetics (which may or may not match superficial traits such as skin colour), ... And it makes no sense using someone's sense of identity to screen them for genetic disease... But it can make more sense when a health issue is correlated to certain social behaviours.
And mixed race people really don't easily fit in the boxes.
The categories themselves are spurious. I'm White Other, from southern Europe. My kids are technically "mixed race" white other/white british. In practice, genetically, we're probably not that far off from your mixed race north african kids, who sound like they look "southern european" (white, but darker, tan easily...)
But me and my kids get bundled with Poles and Swedes, whereas yours would probably be called BAME. Silly labels. Just because some ancestors were born on different sides of the strait of Gibraltar (never mind the fact people of various ethnicities have been settling and mixing on both sides for millenias)
There should probably be a "Mediterranean" ethnicity, quite frankly. The labels are racist, in that they show a very narrow view of the rest of the world (very detailed "us": white this, white that, white "other"; and then everyone else bundled in a single "them darkies")