If "tangoeing" is against the rules, then both should be sanctioned. If it is not against the rules, then let it be.
What you are proposing is making all the women take a contraceptive drug, whether or not they will have sex. This pre-judging all women that they WILL be pregnant. Yet not a singe one of them will get pregnant without the participation of a man, and yet under your system NONE of the men are pre-judged to be procreators.
Therefore, if procreation is a military offense, you've pre-judged ALL the women to be guilty before the fact and NONE of the men to be guilty before the fact. This flies in the face of our fundemental tennet of "innocent until proven guilty".
Well, I personally don't think they ought to be crewing with the men at ALL... and the pregnancy issue is part of why.
If I were in, I would not have a problem with such a policy.
you don't get a choice bout the anthrax vaccine, EITHER in the service.