They just had separate dorms for the two genders, without resorting to medical procedures.
They're not around any more, except as museum villages, and furniture styles, and wood working tools.
Actually there are a few Shakers still around. Very small numbers. Very few converts. But hey, what ever floats their boat. You won’t hear any complaints from me. Like you said, they did not use abortion or other medical ways to controls of fertility, just sleeping in different dorms. One thing that can’t be said of them is that they are Fifty Shades of What ever if you get my drift.
I remember watching a documentary on them years ago. It got to the “no procreations” part and my first thought was “well, then, how are there more Shakers?” Turns out you have to join..or something. Eh..but they make good furniture!