[Dysfunctional endometria]

Functional endometrial disturbances may be divided into four main types: 1) deficient proliferative phase: atrophic endometrium resulting from nonfunctioning ovaries; resting endometrium resulting from inadequate ovarian function; endometrium associated with an anovulatory cycle; and endometrium associated with persistent estrogenic stimulation. 2) deficient secretory phase: delayed secretion (after twenty-two days); persistent secretion; irregular endometrial secretion; and gonadotropic endometrial hyperstimulation. 3) deficient involutive phase: premature involution of the secretory endometrium (synchronous corpus luteum but early breakdown); excessive shedding of the secretory endometrium (synchronous corpus luteum but fast breakdown); and prolonged involution of the secretory endometrium (irregular shedding: persistent corpus luteum). 4) deficient regenerative phase: delayed regeneration (ovular implantation or prolonged treatment by gestagens) and regeneration after curettage or after endometrial subinvolution.