I don't see why not. There is nothing that could stop us except ourselves. It could even be a positive thing. It could enable people who are bad at talking to women the chance to actually be a father, and by that point our genetic tech should be good enough to create the female side of the equation from scratch, perhaps even within the robot itself. It works the other way also. Male robots could spontaneously generate sperm and get a women pregnant who wouldn't other wise be in a relationship. The robot could also be programmed to be an ideal partner, and also programmed to seem like a conscious entity, but not. That way many ethical problems are dodged.