[Woah, they don't know each other well enough for intense eye-gazing. Chekov suspects that he may regret mentioning his replicator to Yen.]
It doesn't make everything. It is a small machine, and it does not have the molecular resolution necessary to duplicate living things. For that, you would need something with the capacity to store and replicate not only all of the atomic and molecular configurations of an individual, but also the quantum and energy states of each subatomic particle and the ability to adjust to accommodate Brownian motion.