The Collaborative International Dictionary of English v.0.48:

blood-related \blood-related\ adj.
   1. related by blood, i.e. by a common genetic heritage.

   Syn: akin(predicate), cognate, consanguine, consanguineous,
        kin(predicate).
        [WordNet 1.5

WordNet (r) 3.0 (2006):

blood-related
    adj 1: related by blood [syn: akin(p), blood-related,
           cognate, consanguine, consanguineous,
           consanguineal, kin(p)]