Abstract
Monthly blood samples from 16 pregnant camel were collected commencing from 60 d post service until the last month of gestation. Two animals aborted and two did not conceive. The average length of gestation was 398 ± 13 and 372 ± 11 d in camels carrying male and female fetus, respectively, with a mean of 383 ± 9 d. Sera were analysed for estradiol-17 beta and progesterone by radioimmunoassay. The mean estradiol levels increased progressively from a basal level of 20 pg/ml at 2 to 3 mo of pregnancy to about 450 pg/ml at the final stages of gestation. The camel bearing a male fetus had relatively lower estradiol concentrations (76.5 ± 10.8 pg/ml) as compared to those carrying a female fetus (112.3 ± 19.6 pg/ml). The mean progesterone levels fluctuated between 4 and 5 ng/ml throughout pregnancy except for a slightly lower value (2.5 ± 0.27) at 9 to 10 mo of gestation. On an average, the camels carrying a male fetus had higher progesterone levels (5.13 ± 0.69 ng/ml) than those carrying a female fetus (3.45 ± 0.28). The data suggested that the steroid hormone levels are influenced by the stage of pregnancy and sex of the fetus. Cases of unnoticed abortion and unsuccessful conception could be identified.
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