
%0 Journal Article
%A Jungnickel, M. K. 
%A Hinds, L. A. 
%T Hormonal profiles in the tammar wallaby, <emph type="2">Macropus eugenii</emph>, following FSH/LH superovulation
%J Reproduction, Fertility and Development
%D 2001/06/22
%V 12
%N 8
%P 457-464
%K 
%R https://doi.org/10.1071/RD99037
%U https://www.publish.csiro.au/paper/RD99037 
%X This study investigated the effect of superovulation with exogenous porcine FSH/LH on the normal hormonal milieu of the tammar wallaby (Macropus eugenii). During seasonal and lactational quiescence, groups of 6 females were treated with either multiple doses of porcine follicle-stimulating hormone (FSH) (8 6 mg i.m., 12 h apart) followed by a single subcutaneous injection of 4 mg porcine luteinizing hormone (LH) on Day 5 or saline. Blood samples were collected throughout each 10-day experimental period and each female was examined twice daily for signs of a recent copulation. On Day 9, females were killed and their reproductive tracts removed for examination and flushed for eggs. During both seasonal and lactational quiescence, treatment with porcine FSH/LH induced circulating concentrations of progesterone, porcine FSH and porcine LH that were within the normal range of the natural tammar oestrous cycle. However, higher plasma oestradiol concentrations (30&#8211;50 g mL&#8211;1) than would be expected in a natural tammar preovulatory rise and the presence of &#8216;highly stimulated&#8217; ovaries in several of the treated animals suggests that some degree of over-stimulation was occurring. During both seasonal sampling periods, behavioural oestrus was detected in treated tammars in the absence of a withdrawal of progesterone. This data suggests that plasma progesterone is not the critical factor inducing behavioural oestrus. 
