noun
primary sexual characteristic
Biological term for sex organs present at birth, as opposed to secondary sexual characteristics that develop during puberty.
第一次性徴は生まれつきの生殖器の違いを指す。
Primary sexual characteristics refer to the differences in reproductive organs present at birth.
Refers to secondary sexual characteristics that appear during puberty, such as breast development or voice deepening.
Compound of 第一次 (primary, first-order) and 性徴 (sexual characteristic). The term is a direct calque from Western medical terminology.