The ovarian-uterine vasculature in relation to unilateral endometrial growth in flying foxes (genus Pteropus, suborder Megachiroptera, order Chiroptera)

Pow, Craig S. T.; Martin, Lauren Drew

doi:10.1530/jrf.0.1010247

Cited by 16 publications

(5 citation statements)

References 11 publications

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“…Unlike the situation in Haplonycteris fischeri (Heideman, 1989a), the corpus luteum persisted throughout pregnancy, and a corpus albicans was sometimes still apparent early in the next pregnancy, although there were signs that the corpus luteum had begun to regress by late pregnancy. The slight uterine progestational reaction (Marshall, 1949;Pow and Martin, 1994) observed in P. jagori was similar to that described by Gopalakrishna and Karim (1971) in Rousettus leschenaulti and by Heideman (1989a) for H. fischeri.…”

Section: Discussionsupporting

confidence: 87%

Age-Specific Reproductive Strategies and Delayed Embryonic Development in an Old World Fruit Bat, Ptenochirus jagori

Heideman

Powell

1998

Journal of Mammalogy

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Ptenochirus jagori (Megachiroptera, Pteropodidae) is a tropical cynopterine fruit bat restricted to the Philippine islands. Samples of bats were obtained over 4 years, and reproductive tracts were preserved and examined using standard histological techniques. Reproductive status also was recorded for bats captured, marked. and released. A facultative post-implantational delay in embryonic development was detected in young P. jagori females reproducing for the first time. The delay occurred at the stage of gastrulation and could last up to 5 months. Adult females showed little evidence of a delay in development. With this delay, young females gave birth only once in their first year and synchronized parturitions with those of adults. Adult females had a gestation period of 4 months and gave birth twice a year, once in late March and early April and once in August. Morphology of early development was similar to that of other cynopterine fruit bats. The evolution and significance of a post-implantational delay in development are discussed.

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Section: Discussionsupporting

confidence: 87%

Age-Specific Reproductive Strategies and Delayed Embryonic Development in an Old World Fruit Bat, Ptenochirus jagori

Heideman

Powell

1998

Journal of Mammalogy

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“…Ovarian follicles unite (put together) in a specific region of the cortex, characterizing the polarized ovaries, which has been observed in some Phyllostomidae species such as Artibeus jamaicensis (Antonio‐Rubio et al., ), Glossophaga soricina (Komar, Zacharachis‐Jutz, Cretekos, Behringer, & Rasweiler, ), Leptonycteris curasoae (Hood & Smith, ), Phyllostomus discolor , Phyllostomus elongatus (Rasweiler & Badwaik, ) and Sturnira lilium (Antonio‐Rubio et al., ) and some Pteropodidae species, Otopteropus cartilagonodus and Ptenochirus jagori (Heideman, Cummings, & Heaney, ; Heideman & Powell, ; Pow & Martin, , ). Except for G. soricina , in which only the area with the primordial follicles is covered with the ovarian surface epithelium (OSE) (Komar et al., ), A. planirostris , as the other species, presented all the ovary covered by the surface epithelium.…”

Section: Discussionmentioning

confidence: 97%

Ovarian morphology and folliculogenesis and ovulation process in the flat‐faced fruit‐eating bat Artibeus planirostris and the Argentine brown bat Eptesicus furinalis: A comparative analysis

et al. 2018

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The Neotropical bat species Artibeus planirostris and Eptesicus furinalis present a different morphology of the female reproductive organs: the first presents a simplex uterus, while the second presents a bicornuate uterus, but there is no information about their ovaries. Our aim was to compare the general ovary morphology and the folliculogenesis process in these species to increase the knowledge about the reproductive diversity of tropical bats. We observed a morphological distinction between the ovaries of both species: A. planirostris presents the primordial follicles located in a cranial portion of the ovary and the interstitial gland cells are not distinctive, while in E. furinalis, the primordial follicles are located throughout the cortex, and there is an abundance of interstitial gland cells. Both species present binovular or triovular follicles. Artibeus planirostris is a monovular species, with a preferential ovulation in the left side. Some females of E. furinalis exhibited two corpora lutea in the same ovary, and others presented a corpus luteum in both right and left ovaries at the same time; thus, E. furinalis is a polyovular species. Our results express the variation between two Neotropical species, reflecting the great variation in the reproductive aspects in Chiroptera.

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“…Much better evidence for the occurrence of a local counter-or crosscurrent transfer of ovarian steroids was subsequently obtained through elegant studies of three species of Australian Pteropus. These established that 1) a branch of the uteroovarian artery vascularizes the cranial end of the ipsilateral uterus in these bats, 2) the anatomical relationship between ovarian venous and arterial vessels is unusually intimate in the presumed region of steroid transfer, and 3) 3 H-estradiol microinjected into the ovary of one species was preferentially transported into the ipsilateral uterus [48,49].…”

Section: Preferential Ovarian Stimulation Of One Side Of the Female Reproductive Tractmentioning

confidence: 87%

“…In the megachiropterans that have been adequately studied, implantation generally occurs at the cranial end of the uterus ipsilateral to the ovary containing the new corpus luteum and, at least in some, this region exhibits preferential stimulation prior to implantation (6,35,44,45,(48)(49)(50)(51)(52)(53)(54). In two species, this seems to also be associated with early closure of the uterine lumen.…”

Section: Preferential Ovarian Stimulation Of One Side Of the Female Reproductive Tractmentioning

confidence: 99%

Embryonic diapause in the short-tailed fruit bat, Carollia perspicillata: why this is postimplantational

Rasweiler¹,

Badwaik²

2020

Proc

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Pregnancy has been studied in Carollia perspicillata bred in captivity or collected from a reproductively-synchronized wild population on Trinidad, West Indies. In both situations, periods of postimplantational embryonic diapause were sometimes observed. In captivity, this was induced by stress, or once-weekly periods of food deprivation, and resulted in gestation periods of highly variable duration (105-237 days). The normal gestation period for this species is 113-120 days. In the wild, Carollia exhibits two synchronized pregnancy periods. One includes a diapause of at least 44-50 days, but probably somewhat longer, while the other is of normal length. The diapause occurs at the primitive streak stage of development. The postimplantational timing of the diapause is associated with multiple other reproductive specializations, all of which seem to be intended to facilitate blastocyst attachment very soon after entry into the uterus, within a preferred implantation zone. Blastocysts of this species were never observed to have passed that zone or to have a prolonged, free-floating period in the main uterine cavity. This facilitates placental development within an optimally vascularized part of the uterus and the eventual production of a large, highly precocious infant. Comparative immunocytochemical and ultrastructural studies of normal versus delayed pregnancies suggest that inadequate trophoblastic differentiation within the developing placenta may play an important role in maintaining the diapause. In part this may be responsible for delayed invasion of the embryonic side of the placenta by vascularized allantoic mesenchyme. The diapause is also associated with greatly increased trophoblastic invasiveness of unknown significance.

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The ovarian-uterine vasculature in relation to unilateral endometrial growth in flying foxes (genus Pteropus, suborder Megachiroptera, order Chiroptera)

Abstract: The ovarian\p=n-\uterinevasculature was examined in three Australian species of

Cited by 16 publications

References 11 publications

Age-Specific Reproductive Strategies and Delayed Embryonic Development in an Old World Fruit Bat, Ptenochirus jagori

Age-Specific Reproductive Strategies and Delayed Embryonic Development in an Old World Fruit Bat, Ptenochirus jagori

Ovarian morphology and folliculogenesis and ovulation process in the flat‐faced fruit‐eating bat Artibeus planirostris and the Argentine brown bat Eptesicus furinalis: A comparative analysis

Embryonic diapause in the short-tailed fruit bat, Carollia perspicillata: why this is postimplantational

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