A Case of Pseudo-Pregnancy in Captive Brown Howler Monkeys (Alouatta guariba)

Colares, Ana Carolina Vasconcelos; Young, Robert J.

doi:10.1159/000080211

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…Spontaneous cases of pseudopregnancy have been widely reported in a number of species including dogs, cats, bears, dwarf mongooses [19] , rodents and non-human primates [20] . It may serve an evolutionary purpose in some species whereby non-reproducing females can feed the offspring of their relatives, if needed [19] .…”

Section: Animal Studiesmentioning

confidence: 99%

Hyperprolactinemia and Delusion of Pregnancy

Ahuja¹,

Vasudev²,

Lloyd³

2007

Psychopathology

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We describe the case of a 44-year-old woman admitted with mania with psychotic symptoms who presented with delusion of twin pregnancy a month after admission, which temporally correlated with hyperprolactinemia secondary to antipsychotic medication. Modification of antipsychotic medication was associated with fall in serum prolactin and disappearance of delusion of pregnancy. In light of this clinically striking temporal association between hyperprolactinemia and delusion of pregnancy, we review the literature to examine the hypothetical relationship. We highlight the clinical significance of examining the various factors, including antipsychotic-induced hyperprolactinemia, which could trigger the development of delusion of pregnancy.

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Section: Animal Studiesmentioning

confidence: 99%

Hyperprolactinemia and Delusion of Pregnancy

Ahuja¹,

Vasudev²,

Lloyd³

2007

Psychopathology

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“…Apart from canids, where overt pseudopregnancy is a physiological phenomenon (Concannon et al, 2009), pseudopregnancy occurs only occasionally in spontaneously ovulating species. Reports exist on swine (DeHoff et al, 1986), some primates (Kasza, 1979;Guedes and Young, 2004) and humans (Manzi et al, 1995). In such spontaneous ovulators studied to date, cyclical luteal lifespan is only extended once maternal recognition of pregnancy took place (Heap et al, 1989), with canids being the big exception to this general rule.…”

Section: Introductionmentioning

confidence: 99%

Prolonged luteal lifespan and pseudopregnancy in Asian elephants (Elephas maximus)

Niemuller¹,

Steinmetz

Bouts³

et al. 2018

Animal Reproduction Science

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Pseudopregnancy is a physiological occurrence in mammals which have copulation induced ovulation, but is rarely described in spontaneous ovulating species. In this study, three cases of prolonged luteal lifespan are reported in non-pregnant Asian elephants (Elephas maximus). Case 1 was a 25-year-old female that had produced three calves previously; Case 2 was a nulliparous and 32-year-old at the start of the pseudopregnancy episode; and Case 3 occurred in a 49-year-old nulliparous elephant. Serum progesterone metabolite concentrations remained elevated for 10 months in Case 1. Urinary progestagens were high for >16 months in Case 2 and for five months in Case 3. In Case 1, multiple persistent corpora lutea were visualized monthly by ultrasonography. In all three cases, uterine leiomyoma were present and progestagen concentrations decreased spontaneously. In Case 1, the elephant became pregnant 3 years later, whilst with Case 2, the female resumed estrous cycling normally, and for the Case 3 female, there was continuation with another prolonged luteal phase before ovarian function was purposely suppressed. These examples indicate that persistently elevated progestagen concentrations may not always be indicative of pregnancy in elephants. The reasons for prolonged luteal lifespan are not understood, although serum prolactin concentrations quantified in the Case 1 female were elevated compared to values from previous reports and two other herd mates. Furthermore, all three elephants had varying degrees of uterine pathologies. It is believed that the resulting damage to the endometrium may have led to a reaction similar to implantation, which includes prolactin secretion. Prolactin may exert luteotropic properties and is thought to initiate luteal rescue during pregnancy in elephants.

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