IPA: //ˈɛstrɪɒl//
KK: /ˈɛstrɪɔl/
A type of estrogen hormone that is produced in the body, particularly during pregnancy, and is important for female reproductive health.
Oestriol levels are often measured during pregnancy to assess the health of the fetus.
Oestriol is derived from "oestrus" (from Greek "oistros", meaning frenzy or passion) and "-iol" (a diminutive suffix in chemistry indicating a smaller or lesser form). The term refers to a lesser form of oestrus, specifically a type of estrogen hormone associated with the female reproductive cycle.
Think of 'oestrus' which relates to a state of passion or frenzy, and remember that 'oestriol' is a smaller or lesser form of that hormonal influence.