Unilateral ovarian absence in two capuchin monkeys

Abstract

Unilateral ovarian absence was confirmed in two capuchin monkeys for the first time.

Unilateral ovarian absence in a Black‐headed Squirrel Monkey (Saimiri vanzolinii Ayres, 1985), a threatened neotropical primate species

“…The first case was observed in a Sapajus apella female. 8 Alopecia was observed in the examined female. This can be a physiological or not physiological process.…”

“…12,13 The observed anomaly was restricted to the absent right ovary, which was supplanted by an ovoid structure with histological characteristics of an oviduct. The differences in the length of the oviducts and broad ligaments might be attributed to a developmental malformation, 1,8,14 probably related to a congenital defect in which the migration of the germ cells did not occur, 14 leading to the non-formation of one of the ovaries. 15 Such defect is more unusual than other anomalies attributed to a failure in the Müller duct development, which causes defects in the oviduct, uterus, cervix, vagina, and extern genitalia.…”

“…For our knowledge, this is the second report of ovarian agenesis in a neotropical primate. The first case was observed in a Sapajus apella female …”

“…Reports describing ovarian agenesis have been published on primates, especially focused on humans, 7 with scarce reports in non-human primates. 8 The importance of documentation from reproductive anomalies such ovarian agenesis encompasses not only the formation of a data basis, but this information can also be used to perform a proper analysis of its occurrence and impacts on the natural habitat of the affected females. Herewith we describe a case of unilateral ovarian absence in Saimiri vanzolinii (black-headed squirrel monkey), a free-living neotropical non-human primate species recently listed as threatened by the IUCN.…”

“…In both cases, unilateral ovarian agenesis is commonly asymptomatic. Reports describing ovarian agenesis have been published on primates, especially focused on humans, with scarce reports in non‐human primates . The importance of documentation from reproductive anomalies such ovarian agenesis encompasses not only the formation of a data basis, but this information can also be used to perform a proper analysis of its occurrence and impacts on the natural habitat of the affected females.…”