Spontaneous uterine activity during the oestrous cycle of the camel (Camelus dromedarius)
Spontaneous uterine activity was studied in three cyclical female camels implanted with balloon-tipped catheters connected to pressure transducers. Another camel was not operated upon. The frequency of contractions in both horns varied from zero to a maximum of 90 h−1, whereas the amplitude of contractions varied from zero to a maximum of 3.5 kPa during the experimental period. Uterine activity was higher in the left horn. Concentrations of oestradiol-17β increased as the follicle grew in size in the non-operated camel. The pattern of uterine activity was correlated with the circulating levels of oestradiol-17β (r=0.83, P<0.001, n=3). It was concluded that uterine activity in the camel is dependent on oestrogen level.
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