1985
DOI: 10.1530/jrf.0.0740047
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Follicular development, ovulation, fertilization and fetal development in tenrecs (Tenrec ecaudatus)

Abstract: Reproduction in female tenrecs was studied on Praslin Island (4 degrees 20'S, 55 degrees 45'E) in the Seychelles from November 1977 to September 1980. Dissection and histological examination of reproductive tracts revealed that each ovary is encapsulated in a bursa. Polyovular follicles were abundant and contained up to 5 oocytes. The occurrence of more implanted fetuses than corpora lutea (CL) indicated successful polyovuly in 25% of pregnancies. No antrum was observed during follicular growth at oestrus, and… Show more

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Cited by 28 publications
(18 citation statements)
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“…Only in the Tenrecidae is there reasonable evidence that fertilisation may occur within the ovarian follicle itself (Strauss, 1950 ;Nicoll & Racey, 1985), and our limited observations do not support Pearson's (1944) suggestion that this may occur in Blarina brevicauda. However, detailed scrutiny of sperm-egg interactions among the Lipotyphla again has been limited to a few shrew species.…”
Section: Sperm/egg Interactionscontrasting
confidence: 62%
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“…Only in the Tenrecidae is there reasonable evidence that fertilisation may occur within the ovarian follicle itself (Strauss, 1950 ;Nicoll & Racey, 1985), and our limited observations do not support Pearson's (1944) suggestion that this may occur in Blarina brevicauda. However, detailed scrutiny of sperm-egg interactions among the Lipotyphla again has been limited to a few shrew species.…”
Section: Sperm/egg Interactionscontrasting
confidence: 62%
“…Thus, sperm transport to the upper oviduct may be less restricted in tenrecs, perhaps as a correlate of its eggs being fertilised within the follicle (Strauss, 1950;Nicoll & Racey, 1985). In shrews (and by implication, moles) the pattern of sperm behaviour in the oviduct is very different, as a correlate of their crypts.…”
Section: Sperm Transport Within the Female Tractmentioning
confidence: 99%
“…There was no evidence of polyovulation in either of the species examined, in contrast to the situation reported in the streaked tenrec H. semispinosus [Strauss, 1938b] and Tenrec ecaudatus [Nicoll and Racey, 1985] and in the elephant shrew, Elephantulus myurus [van der Horst and Gillman, 1941]. Polyovulation is also variable in different elephant shrew species [Tripp, 1971].…”
Section: Discussionmentioning
confidence: 69%
“…Non-antral follicles in ovaries that lack a well-formed tunica albuginea have been associated with eversion of the corpus luteum in tenrecs [Nicoll and Racey, 1985]. Whether or not such eversion occurs in the two species examined here could not be directly determined, although the cup-shaped structure of some corpora and protruding nature of others suggests such a possibility.…”
Section: Discussionmentioning
confidence: 81%
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