Men do other things to get out of duty. Same difference.
In addition, some male military members .... even sometimes gangs of military males ....rape civilians, some of them children (like the cases in Japan and Korea). That is not something women do. Should we assume then, that all men are rapists in waiting, like time bombs waiting to go off?
That is the logic being presented by some here w/r/t pregnancy.
Statistically, we know that military persons will commit crimes, use drugs, etc. in about the same proportion as in the civilian community. So, using the logic presented by some on this thread, we should not allow humans in the military.