Young women with an eventual diagnosis (e.g. family screening) who do not yet wish to have children: possibility of preserving eggs in anticipation of possible premature ovarian failure or early menopause. Women who wish to become pregnant provided that their ovarian reserve is sufficient: in vitro fertilisation with pre-implantation genetic diagnosis or prenatal diagnosis. Women who wish to become pregnant but have no ovarian reserve: oocyte donation. If it is the man who suffers from Fragile X syndrome, donor sperm can also be used to prevent the transmission of the pathology to the offspring.