Microglia (immune cells) and the RANK protein are essential for triggering puberty and maintaining fertility in the brain.

Julian Koplin receives research funding from Ferring Pharmaceuticals for an unrelated project. Neera Bhatia receives funding from UKRI Arts and Humanities Research Council for an unrelated project.

Scientists have created human eggs containing genes from adult skin cells, a step that someday could help women who are infertile or gay couples have babies with their own genes but would also raise ...