Hormone concentrations before and after semen-induced ovulation in the bactrian camel (Camelus bactrianus)
in ReproductionSummary. During the follicular phase of bactrian camels, basal concentrations of LH were 2·7 ± 1·2 ng/ml. By 4 h after insemination peak values of 6·9 ± 1·0 ng/ml occurred. In addition, a smaller LH peak (5·4 ± 2·5 ng/ml) appeared 1 day before regression of the follicle began in unmated camels. During the follicular phase peripheral plasma progesterone values were low (0·36 ± 0·28 ng/ml), but values increased to reach 1·73 ± 0·74 ng/ml at 3 days and 2·4 ± 0·86 ng/ml, at 7 days after ovulation. Plasma oestradiol-17β concentrations were 26·8 ± 9·0 pg/ml during the follicular phase and 30·8 ± 5·1 pg/ml when the follicle was maximum size. Values fell after ovulation but rose to 29·8 ± 6·5 pg/ml 3 days later.
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