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Plasma progesterone through pregnancy and the estrous cycle in the eastern quoll, Dasyurus viverrinus.

Abstract：

:Plasma progesterone concentrations were measured every 2 or 3 days in eastern quoll, Dasyurus viverrinus, during pregnancy (20.5 +/- 0.8 days, n = 6, mean +/- SEM) and the estrous cycle (37.5 +/- 0.7 days, n = 20, mean +/- SEM). The pattern was not apparently different between the two reproductive states. There was a significant proestrus rise in progesterone (from 0.5 to 4 ng/ml) from 5 days before until 1 day after mating. For the next 4 to 6 days, levels were low, but after Day 9 or 10 increased to maximum concentrations of 4.5 to 15 ng/ml which were maintained until about Day 17 to 19. In all females, progesterone was basal (less than 1.0 ng/ml) by Day 20 to 21 and thereafter remained low in lactating females, but nonpregnant females showed a proestrous rise about 5 to 7 days before the next mating. The period of elevated concentrations of progesterone coincided with prominent corpora lutea (CL) on the ovaries. There was no evidence of CL of a previous cycle persisting into the next cycle. The results indicate that pregnancy occupies the luteal phase of the cycle and does not appear to influence the secretory life span of the CL.

journal_name

Gen Comp Endocrinol

journal_title

General and comparative endocrinology

authors

Hinds LA

doi

10.1016/0016-6480(89)90015-4

subject

Has Abstract

pub_date

1989-07-01 00:00:00

pages

110-7

issue

1

eissn

0016-6480

issn

1095-6840

journal_volume

75

pub_type

杂志文章

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