Yes.

Because of the necessity of keeping weapons at hand, no soldier was allowed to have his keeper sleep with him. Mark dried off while the woman stood sullen and dripping nearby, then dressed and led her back to the stockade. While his body hoped she wasn't pregnant, because she'd be taken back to the birth centers if she was, Mark knew his service to his people required him to impregnate women if possible. Fortunately, being an active member in the army meant that exhaustion was usually a legitimate excuse, as it was tonight, for not fucking her four or five times a day. Though the army encouraged doing one's reproductive duty, and always kept on hand a considerable number of unkeepers, women not assigned to any soldier in particular, they always reminded troopers not to exhaust themselves; they were more valuable as soldiers than as fathers. Mark retired sated and sleepy to his bunk for the night, and woke up the next day to report for duty.