Vaginal electrical resistance (VER) to monitor follicular changes and pregnancy in camels

Lactating non pregnant female camels (n = 12) were examined every alternate day by transrectal ultrasonography and the vaginal electrical resistance (VER) was recorded during the breeding season in order to evaluate the correlation of follicle dimensions and VER, for using VER to evaluate oestrus and pregnancy in she camels. Follicular growth and ovulatory size follicle was evident in 66.66% she camels during the 1^st month of the breeding season. In 33.33% she camels, although follicular growth was evident but the follicle did not reach ovulatory size. The VER in she camels when there was no follicle, a follicle of < 5 mm, follicle 5 – 10 mm and follicle > 10 mm was 37.67 ± 0.09, 38.09 ± 0.12, 38.80 ± 0.13 and 39.0 ± 0.0 ohms, respectively. The values did not differ significantly. Behavioural receptivity of females towards stud camels was erroneous and females evidenced respectiveness, towards studs in the presence of an ovarian follicle irrespective of its size. The cocking of tail was an accurate sign of pregnancy in she camels at day 15 to 25 and ultrasonography could detect foetus and its annexes with high accuracy at 30 days of pregnancy. The VER in pregnant camels was 37.67 ± 0.33 which did not differ from non pregnant she camels. It was concluded that VER has got poor relationship with follicle diameter in female camels either for estrus or pregnancy detection.