However, these results may principally reflect village endogamy rather than consanguinity per se. Roman civil law prohibited marriages within four degrees of consanguinity. They had a papal dispensation for both consanguinity and affinity. I was annulled on grounds of consanguinity. The Church at the time regarded any union within seven degrees of consanguinity as incestuous. Relations may be by consanguinity or affinity, meaning by blood or by marriage. Parental consanguinity is a significant factor in diagnosis. He repudiated Adelaide and divorced her in 1199 on the grounds of consanguinity. Blanche also petitioned the pope to forbid the marriage on the account of consanguinity. Many countries maintain a standard of required distance (in both consanguinity and affinity) for marriage. However, other scientific studies dispute the ideas of any linkage between fertility and consanguinity. He repudiated her in 1080, possibly on grounds of consanguinity. Double first cousins share the same consanguinity as half-siblings. Almodis and Hugh of Lusignan divorced due to consanguinity. The Knot System is a numerical notation that defines consanguinity.