
TY  - JOUR
A1  - Fletcher, IC 
T1  - Effects of nutrition, liveweight, and season on the incidence of twin ovulation in South Australian strong-wool Merino ewes
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1971
VL  - 22
IS  - 2
SP  - 321
EP  - 330
KW  - 
UR  - https://doi.org/10.1071/AR9710321 
N2  - The effects of nutrition on the incidence of twin ovulation in strong-wool Merino ewes were studied at two seasons. Liveweight at the time of ovulation was the important determinant of twinning rate. Over the liveweight range 42-57 kg, the incidence of twin ovulation increased by about 2 . 5 % for each 1 kg increase in liveweight at ovulation due to variation in recent nutrition, and by about 1.3 % for each 1 kg of liveweight at ovulation due to inherent variation in liveweight. These relationships did not vary significantly between January and April. The incidence of twin ovulation was not enhanced by a state of increasing liveweight before ovulation ('flushing'), and did not vary significantly between January and April. 
ER  -

