1、有难产或生殖道阻塞的既往病史;直肠降温(降至37℃)持续24小时未生产;
2、腹壁强力收缩持续30-60分钟,新生胎儿未产出;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/ae51f3deb48f8c540cad1c3035292df5e0fe7fb7?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、主动分娩1-2小时无幼仔排出;
4、主动分娩时,其休息期超过4~6小时;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/14ce36d3d539b6005b57d1a8e650352ac65cb710?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5、动物疼痛明显(呻吟,舔啃阴门);阴道有黯黑、脓样或血样分泌物排出;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/9f510fb30f2442a7346a24bade43ad4bd113024d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
6、妊娠期延长(超过70天).
观察犬是否出现怒责情况,怒责半天没有生产,确定难产。若发现羊水破水无幼犬生出确定难产。如果已生出一胎,而后一胎超过2小时还未生产且宫缩无力确定难产。建议去医院进行B超检查,检测犬骨骼、内脏发育情况,以及羊水的多少确定大约生产日期。
此外,狗狗在临产前会出现体温变化,有便利的养狗者可以测量狗狗体温。