You said you didn't want to kill any shrimp... not sure if you meant you personally don't want to kill them, or if you meant you don't want any shrimp to die in your tanks at all. You should be able to naturally control population one of these ways, but two of them involve shrimp deaths, not by your hand but as part of the circle of life:
restrict feeding, making the tank inhospitable for baby shrimp (they simply won't have anything to eat and won't survive)
another possible outcome of restricting feeding is actually that the females won't berry at all due to food not being prevalent enough, or maybe not getting enough protein (no deaths)
add some guppies, tetras, or other small fish to eat small shrimplets, controlling population for you
Can also try to make a male-only tank as suggested above, but might not be feasible depending on your situation and where you're getting your shrimp. I'm personally okay with natural selection and predation in my tanks if I keep fish and shrimp together, but not everyone is. With the above methods there may occasionally be some babies that survive, but not enough to overtake your tank (if they start getting out of control add more fish/restrict feeding more).