Uterine activity after ovariectomy in the camel (Camelus dromedarius): effect of exogenous administration of oestrogen and progesterone.
During oestrous cycles of the camel, spontaneous uterine contractions were correlated significantly with plasma oestradiol-17 beta concentration. Ovariectomy in the camel resulted in a decreased plasma concentration of oestradiol-17 beta (< 15 pg ml-1) and progesterone (< 0.1 ng ml-1) and caused complete cessation of uterine activity. Daily administration of oestradiol benzoate (5 mg, intramuscularly) increased the plasma concentration of oestradiol-17 beta (> 45 pg ml-1) and increased the frequency and amplitude of uterine activity. Coadministration of progesterone (100 mg, intramuscularly) increased the plasma concentration of progesterone (> 4 ng ml-1) and increased the frequency but not amplitude of uterine activity. It is suggested that uterine activity in the camel is correlated with the circulating levels of oestradiol-17 beta and progesterone.
Homeida
A M
AM
Camel Research Centre, College of Veterinary Medicine and Animal Resources, King Faisal University, Al-Ahsa, Saudi Arabia.
al-Eknah
M M
MM
Dafalla
E A
EA
Galil
A K
AK
al-Taher
A Y
AY
D000818:Animals; D002162:Camelus / Q000502:physiology*; D004958:Estradiol / Q000008:administration & dosage / Q000097:blood* / Q000494:pharmacology; D005260:Female; D007273:Injections, Intramuscular / Q000662:veterinary; D010052:Ovariectomy / Q000662:veterinary*; D011374:Progesterone / Q000008:administration & dosage / Q000097:blood* / Q000494:pharmacology; D014590:Uterine Contraction / Q000502:physiology*
D011374:Progesterone; D004958:Estradiol