noun
- A weak estrogen hormone produced mainly by the placenta during pregnancy; one of the three main estrogens in the human body.
Usage: medical/scientific term; also spelled estriol in U.S. English; commonly measured in prenatal screening tests
Examples
- Oestriol levels rise significantly during pregnancy and are monitored as part of prenatal care.
- The triple screen test measures oestriol along with other markers to assess fetal health.
- Oestriol is produced by the fetus and placenta, making it a useful indicator of pregnancy status.
- Low oestriol levels may warrant further investigation during pregnancy screening.
- Unlike estradiol, oestriol has weaker estrogenic activity in most tissues.