hypoestrogenemia

noun

hy·​po·​es·​tro·​ge·​ne·​mia ˌhī-pō-ˌes-trə-jə-ˈnē-mē-ə 

variants or chiefly British hypo-oestrogenaemia

-ˌēs-trə- 

: a deficiency of one or more estrogens (as estrone or estradiol) in the blood