OK, I am going to disagree here, very strongly actually.
First of all, one has to know what the "Combat Arms" actually are. And no, it is not just infantry, tanks, and artillery.
It also includes Air Defense, Aviation, and Combat Engineers. Women do serve in all three of those branches, and have little to no negative impact on them. After all, it does not matter if the person emplacing and reloading a PATRIOT missile launcher, or the person in the command van launching the missiles to intercept a target is male or female. No more than it matters if the helicopter pilot attacking a BMP is male or female. Those are the kinds of tasks where it is so "mechanized" that any difference between male and female does not matter at all.
Even reloading the missiles on a PATRIOT launcher, the sex of the individual does not matter worth a damn. You are going to have one person operating a crane, and the other two are climbing on the launcher loosening and tightening bolts. It is not like artillery, where the crews are expected to move around 100 pound 155mm shells. Or in armor, where they would be expected to replace the tracks by hand, or constantly move 50 pound 120mm rounds.
This is the problem most have when trying to discuss this topic. On both sides of the extreme you have people pushing agendas, and completely ignoring what actually applies.
Myself, I have absolutely no problem with females in the last three branches. Because in none of them does it matter worth a damn. However, it does very much matter in the other branches of "Combat Arms", and because of physical limitations I do believe women largely do not belong. That being infantry, armor, and artillery. Women in Air Defense, makes absolutely no difference. Women in Infantry, you very much will have an issue simply because of physical limitations.
This is why I hate when people use such broad terms to politicize something.