Henry, by virtue of being assumed to be male, although I haven't told you that he's the XY one, by virtue of being assumed to be male is now liable to be drafted, which Mary does not need to worry about.
Henry, en virtud de ser considerado hombre -si bien no les he dicho si es XY-, en virtud de ser considerado hombre ahora es pasible del enrolamiento obligatorio del que Mary no tiene que preocuparse.