With the introduction of oocyte vitrification, a special form of intergenerational intrafamilial medically assisted reproduction (IMAR) has now become feasible: fertility preservation for mother-to-daughter oocyte donation (FPMDD). For girls diagnosed with premature ovarian insufficiency (POI), banking of their mothers' oocytes can preserve the option of having genetically related offspring. Since policy documents on IMAR do not discuss specific concerns raised by FPMDD, clinicians can feel at a loss for guidance with regard to handling these requests. Through a comparison of FPMDD with reproductive practices in which similar concerns were raised, proportionality of cryopreservation for self-use and pressure to use the oocytes in fertility preservation in minors, we argue that FPMDD can be acceptable under conditions. The paper ends with recommendations for handling FPMDD-requests, including different options for the legal construction of this form of oocyte donation.