The semen was collected by masturbation.2.
由专科医生进行生殖系统检查，手淫法收集精液。
参考来源 - 空军雷达作业人员精液检测与精子染色质结构分析We inseminated 12 hours after the first signs of heat with frozen semen.
12小时后,在出现最初发情迹象时用复苏的冷冻精液对其进行人工授精。
参考来源 - 西农萨能奶山羊人工授精、胚胎移植技术的应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N-UNCOUNT Semen is the liquid containing sperm that is produced by the sex organs of men and male animals. 精液
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