Follicular wave status at the beginning of the FSH treatment modifies reproductive features in superovulated sheep
2006
SUMMARY In the current study we investigated whether the developmental status of the two largest follicles (LF1 and LF2) at the time of administration of the first two doses (0 and 12 h) of FSH of a superovulatory treatment influences periovulatory events and embryo yields in sheep. A larger size of LF1 was negatively correlated with embryo recovery (r=-0.608 for 0 h and r=-0.523 for 12 h, p<0.05), fertilization (r=-0.464 for 12 h, p<0.05) and viability (r=0.775 for 12 h, p<0.005). Embryo viability rates were also lower when a higher difference between LF1 and LF2 (r=-0.839 for 0 h and r=-0.761 for 12 h, p<0.01) and a smaller size of LF2 (r=0.877 for 0 h and r=0.622 for 12 h, p<0.01) were observed. This indicates the existence of a limit in the follicular
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