Pacific Fertility Center in San Francisco, California, faces a federal class-action lawsuit after one of its storage tanks lost liquid nitrogen for a short time in early March of 2018, which may have caused the loss of some frozen eggs and embryos. The lead plaintiff, identified only as S.M., alleges gross negligence on the part of Pacific Fertility Center in the maintenance, inspection, and monitoring of the malfunctioned storage freezer, which resulted in the loss of S.M.'s eggs.