Schams D, Lahlou-Kassi A, Glatzel P
J Endocrinol. 1982 Jan;92(1):9-13. doi: 10.1677/joe.0.0920009.
Oxytocin was measured radioimmunologically during the oestrous cycle in six ewes of each of two local Moroccan breeds of sheep. Concentrations in both breeds approached the lower limit of the assay (3 pg/ml) from 2 days before oestrus, throughout heat and ovulation until day 2 of the cycle. Oxytocin concentrations then increased in both breeds, the resulting highest levels on days 5-7 were, on average, between 30 and 60 pg/ml in the D'man sheep and 13-31 pg/ml in the Timhadite breed. Oxytocin levels then decreased to about 7 pg/ml in the D'man and about 4-5 pg/ml in the Timhadite breed on days 14-15. After ovariectomy oxytocin concentrations remained at about the limit of detection for a further 19-20 days in both breeds.
采用放射免疫法测定了摩洛哥当地两个绵羊品种各6只母羊发情周期中的催产素水平。两个品种的催产素浓度在发情前2天至整个发情期和排卵期直至周期第2天均接近检测下限（3皮克/毫升）。之后两个品种的催产素浓度均升高，在第5 - 7天，D'man品种的最高浓度平均在30至60皮克/毫升之间，Timhadite品种为13至31皮克/毫升。在第14 - 15天，D'man品种的催产素水平降至约7皮克/毫升，Timhadite品种降至约4 - 5皮克/毫升。卵巢切除术后，两个品种的催产素浓度在接下来的19 - 20天内仍维持在检测限左右。
