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Placenta extrachorialis in the stumptailed macaque (Macaca arctoides)
Laboratory Animal Science
|February 1, 1978
Summary
Placenta extrachorialis, a placental condition, was found in two of 56 macaques. This finding may explain pregnancy complications in first-time mothers (primiparous) of these primates.
Area of Science:
- Reproductive biology
- Primate medicine
- Pathology
Background:
- Placenta extrachorialis is a placental anomaly.
- Stumptailed macaques (Macaca arctoides) exhibit high rates of pregnancy complications, particularly in primiparous females.
Observation:
- Two cases of placenta extrachorialis were identified in 56 placentas from Macaca arctoides.
- The condition presented as an annular ring of necrotic tissue and fibrin at the margin of the villous chorion.
Findings:
- Placenta extrachorialis occurred in 2 of 6 known primiparous stumptailed macaques.
- A potential link between placenta extrachorialis and pregnancy issues in primiparous macaques was observed.
Implications:
- Placenta extrachorialis may contribute to the high incidence of pregnancy-related problems in primiparous stumptailed macaques.
- Further research into this placental condition could improve reproductive outcomes in this primate model.