noun. An estrogenic hormone, C₁₈H₂₄O₃, that is a metabolite of estradiol and is found in the urine of pregnant women.

noun. A steroid hormone produced mostly during pregnancy

noun. a naturally occurring estrogenic hormone; a synthetic form is used to treat estrogen deficiency

"The issue flared last year, when the FDA declared that custom-mixed hormones were no safer than traditional treatments and warned pharmacies to stop using estriol, which is not approved in this country for any use."

estrogen  oestrogen  

and  anticoagulants  cyclophosphamide  estradiol  eversion