Light microscopy of the endometrium of the dusky leaf-monkey (Presbytis obscura).

Specimens of this langur species were available from juvenile, adult and lactating animals. The endometrial sections of non-pregnant adults were dated from the ovarian appearances. During the cycle the endometrium underwent changes similar to those decribed for women, baboons and macaques, except that stromal oedema was pronounced and diffuse in the langur, occurring before ovulation and throughout the secretory phase.