RESUMEN
Two pools of whole buffalo follicular fluid collected in winter (December, January) and spring (March, April) season were fractionated by Sephadex G-200 column chromatography. Follicular fluid collected in winter and spring eluted into different pattern resulted into four and three peaks respectively. Both the pools of follicular fluid were salted out with 18.5% ammonium sulphate. The salted out fraction of winter and spring season follicular fluid was again subjected to sephadex column chromatography which eluted into two and single peak respectively. Whole follicular fluid (0.6 ml) was administered into ovariectomized mice to see its inhibitory effect. The percentage of compensatory ovarian hypertrophy was 16.3 +/- 4.4 which was significantly different (P < 0.01) as compared to control. 200 micrograms material from peak 1 and peak 2 obtained after fractionation of salted out winter follicular fluid also had inhibitory effect on compensatory ovarian hypertrophy as compared to control group. It was 35.6 +/- 9.3 and 15.9 +/- 4.3% respectively. Thus, the variation in nature of buffalo follicular fluid and its inhibitory effect in ovariectomised mice have significant relation with anoestrus condition in summer and humid months in this species.