Why does Jephthah’s daughter weep? Readers have creatively imagined the causes of her tears as she weeps upon her betulim—usually translated virginity or maidenhood. But her menstrual cycle’s relation to these terms is rarely mentioned. A child-oriented theoretical and methodological foundation and research with post-menarcheal girls provide new answers to oft-raised questions about Bat-Yiphtach’s weeping and her agency. Through an in-depth philological review and a focus on the “excluded middle” of the child-adult binary, this translation and interpretation of the story contribute to the field of childhood studies and shows that menarche and menstruation play a larger role in the narrative than readers have realized.