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Mammals (other)
Fatal peripartum haemorrhage in a white-naped mangabey (Cercocebus lunulatus) associated with placenta previa
  1. Janne M Schoening1,
  2. Emma Sargent1,
  3. Mairead Foley1,
  4. John Bainbridge2 and
  5. Joseph Cassidy1
  1. 1 Pathobiology Section, University College Dublin School of Veterinary Medicine, Dublin, Ireland
  2. 2 Village Vets Argyle and Bainbridge, Dublin, Ireland
  1. Correspondence to Dr Janne M Schoening; janne.schoening{at}


A 20-year-old zoo-born female gravid white-naped mangabey (Cercocebus lunulatus) was found dead adjacent to a pool of blood. The uterus contained one female fetus in breech malposition that was developed to term. The cervix was fully dilated and fetal membranes had ruptured indicating early parturition. The placenta was located ventrally within the posterior uterus and fully blocked the os cervix. It showed multiple areas of acute haemorrhage, and was considered the source of fatal peripartum maternal haemorrhage. These findings are consistent with a diagnosis of placenta previa, an abnormal implantation of the placenta in the lower uterine segment in humans and other primates. Risk factors reported in humans, which were also present in this monkey, include pluriparity, increased maternal age and the possibility of dystocia during previous pregnancies. To our knowledge, this is the first report of placenta previa in mangabeys.

  • primates
  • pathology
  • reproduction
  • dystocia
  • placenta previa
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  • Contributors JMS and JC supervised the necropsy, performed histopathological examination, prepared the initial draft and revised the manuscript. ES and MF performed the necropsy and prepared the initial draft. JB was the clinician, provided important background information and revised the manuscript. All authors approved the final manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data sharing statement There are no additional data available for this paper.

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