Use "intermarriage|intermarriages" in a sentence

1. The human cost was enormous, not only because of the extremely deadly wars, but also due to intermarriages among blood relatives which produced abnormal children.

Le coût humain est énorme, non seulement à cause des guerres extrêmement meurtrières, mais aussi à cause des mariages consanguins qui engendrent des enfants anormaux.