@conference {40607,
	title = {Residual effect of a four weeks grazing of oestrogenic red clover on reproductive performance of ewes in the following six weeks.},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {235-238},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {The trial was conducted to study if the temporary infertility in ewes  
induced by oestrogenic clover, would recover accompanied by a concomitant  
increase in ovulation rate and/or litter size following their removal to a  
{\textquoteright}safe{\textquoteright} pasture.  Romney ewes (N - 155) either grazed on Pawera red clover or  
Ryegrass-white clover (control) pasture for four weeks.  Afterwards all ewes  
grazed ryegrass-white clover pasture and were mated in 3 groups either at the  
first, third or sixth week post-treatment.  Mean ovulation rate was significantly  
lower (P<0.05) in the Pawera ewes (1.22 {\textpm} 0.06) than in the controls (1.49 {\textpm}  
0.07) on respective treatments after two weeks of grazing.  Ovulation rates in  
ewes after the 1st, 2nd and 3rd mating cycle were 1.60 {\textpm} 0.12, 1.41 {\textpm} 0.10, 1.27  
{\textpm} 0.09 (red clover), and 1.64 {\textpm} 0.10, 1.67 {\textpm} 0.12, 1.30 {\textpm} 0.90 (control)  
respectively.  Ovulation rate and litter size were similar for the two treatment  
groups after joining in week 1, 3 or 6 post-treatment (P>0.05).  No increase in  
ovulation rate/litter size in Pawera group ewes was observed over and above  
those observed in the control ewes within the six week post-treatment period. },
	issn = {1176-5283},
	author = {Anwar M and Keogh RG and McDonald MF}
}
