hypoestrogenism

noun

hy·​po·​es·​tro·​gen·​ism -ˈes-trə-jə-ˌniz-əm 

variants or chiefly British hypo-oestrogenism

-ˈēs-trə- 

: a deficiency of estrogen in the body

long-term administration of a gonadotropin-releasing hormone agonist induces hypoestrogenism and amenorrhea

—B. D. Cowan et al.

hypoestrogenic

-ˌes-trə-ˈjen-ik 

adjective

or chiefly British hypo-oestrogenic

-ˌēs-trə-