血缘的英文的缩写为consanguinity。
双语例句：
1、乙肝病毒前S1抗原与血缘传播的慢性HBV感染之间相关性的初步研究
Preliminary Study on the Relevance of the Pre-s1 Antigen and Chronic HBV Infection Transmited by Consanguinity
2、结合文献，就XP患者的临床、分型、血缘关系及肿瘤的发生进行了分析讨论。
The clinical features， classification， consanguinity and tumor incidence in XP are discussed.
