Complete oophorectomy, or any equivalent form of operative sterility.
RELATIVE AND TRANSIENT.
Incomplete development of the ovaries.
Imperfect formation of ova, owing to marriage when still too young (amenorrhœa).
Ovarian tumours and oophorectomy, whereby, however, a remnant of healthy ovarian tissue is spared.
Chronic oophoritis and perioophoritis; syphilitic disease of the ovaries.
Excessive obesity, anæmia, chlorosis, scrofula, morphinism, alcoholism, various conditions affecting unfavourably the innervation or nutrition of the ovary; change of climate or mode of life; emotional disturbance; inbreeding, hereditary predisposition.