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Sex determination involves multiple mechanisms, including interactions among sex chromosomes, gene networks, gonadal differentiation, hormones, and cellular mosaicism.
Biological sex is a multidimensional classification based on physical and physiological traits—chromosomes, reproductive anatomy, hormones and related biology—most commonly labeled male or female at b...
Reporting alleges that Jeffrey Epstein was described by some witnesses and a survivor as having an unusually shaped or “egg/ lemon”-shaped penis, and that an attorney raised that description in a 2009...
in biology is primarily defined by which gametes an individual is organized to produce—large immobile ova (female) or small motile sperm (male)—and in mammals this reproductive fate is set largely by ...
The idea of a single, uniform “trans‑brain” is false: the scientific literature finds patterns of neuroanatomical variation in some transgender people but also large heterogeneity and methodological l...