A high inclusion rate and low drop out rate was achieved. This study will be the first to determine whether school meals based on the NND improve children's diet, health, growth, cognitive performance, and early disease risk markers.

No conflict of interest was reported. The study was supported by grants from The European Society for Human Reproduction and Embryology (ESHRE), Sahlgrenska University Hospital, Gothenburg, Sweden, the University of Copenhagen, Denmark, the Danish Agency of Science, Technology and Innovation and the Nordic Federation of Societies of Obstetrics and Gynecology (NFOG).

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This study indicates that there is widespread awareness and support of the availability of eggs freezing for reproductive planning. Reassurance regarding its efficacy appears more important than its potential adverse effects on their health or that of future children, or the costs of the procedure.