Oestriol Blood Test, from our experts to you.Dr Sam Rodgers MBBS, MRCGP
Chief Medical Officermeet our doctors
What is oestriol?
Oestriol is a form of oestrogen produced by the placenta. About three to five weeks before labour begins, the amount of oestriol in the placenta increases dramatically.
Is oestriol only present during pregnancy?
Oestriol is present throughout a woman's lifetime at varying levels. It is commonly linked to pregnancy as that's when it is produced in the most measurable amounts.