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In France, fertility preservation (FP) was until recently very rarely offered to transgender persons, even if they had an existing desire for a child. The proposed treatments, hormone therapy, and reassignment surgery are far from being without risk for gametic quality and production. French law authorizes FP before any treatment that has sterilizing risks. Thus, several centers for the study and preservation of eggs and sperm (Centres d’étude et de conservation des oeufs et du sperme, Cecos) have responded to these new requests. A national multicenter survey was conducted between January 2019 and October 2020 in 28 French Cecos network centers. Each center was surveyed to find out how many trans individuals were visiting, being informed, and being managed for FP. During this period, nearly 600 trans individuals visited a Cecos. Trans men were significantly younger than trans women. Nearly half of the trans people who came were able to perform egg or sperm conservation, with 66% of trans women doing so, but only 11% of trans men. This study shows that the vast majority of Cecos are able to offer trans people FP, and is the first study with such a large population.