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  • Title: Effects of corpus luteum removal on progesterone, estradiol-17 beta and LH in early pregnancy of the tammar wallaby, Macropus eugenii.
    Author: Fletcher TP, Renfree MB.
    Journal: J Reprod Fertil; 1988 May; 83(1):185-91. PubMed ID: 3397936.
    Abstract:
    The quiescent corpus luteum of female tammars was reactivated by removal of the pouch young (RPY). The reactivated corpus luteum was ablated 3 days after RPY. Plasma progesterone and oestradiol concentrations were measured by radioimmunoassay in these and in sham-operated controls. Excision of the CL abolished the rise in progesterone seen at Day 5-6 in the sham-operated animals (130.7 +/- 56.6 vs 452.4 +/- 176.0 pg/ml, mean +/- s.d.). By contrast, oestradiol-17 beta values increased within 6-16 h of CL excision to 16.3 +/- 6.9 pg/ml and remained high for 1-3 days while in the sham-operated animals there were less sustained and more variable peaks of 10-20 pg/ml between Days 3 and 5 (mean 12.0 +/- 3.6 pg/ml at Day 4-5). We conclude that the early transient increase in peripheral plasma of progesterone is of luteal origin but the source of the oestradiol remains unknown.
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