  Li {\it et al.\/} (2024) reported a 4.605 day period in the repeating FRB
20121102A in addition to the previously reported 157 day modulation of its
activity. This note suggests that the shorter period is the orbital period of a
mass-transferring star orbiting a black hole, possibly of intermediate mass,
and that the 157 day period is the precession period of an accretion disc
around the black hole. The mass-losing star must be evolved.
