Well, this has been a problem ever since women were allowed to work in the military in any capacity. When my husband was in, right before every deployment, there would invariably be more than one woman on his ship who got pregnant. They were simply not deployed and continued to work on base until they reached the point in their pregnancy where the rules dictate you can no longer work. From what I understand, these women were redeployed after a certain period of time, something like 6 months after birth, IIRC. Women who get pregnant while deployed are likewise sent back home, but a Navy study has shown that loss of work time from pregnant women is no higher than loss of work time from men, who are often out due to disciplinary issues or non-service-related injuries. So it's not even clear that losing pregnant soldiers is a major contributor for loss of billets. And for what it's worth, there's a serious stigma attached to getting pregnant, since everyone automatically assumes you did it to get out of deployment or go home, and there's pressure to terminate. Which leads me to....