"In some embodiments, an effective amount of relaxin is an amount that is effective to increase arterial compliance by at least about 5%, at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, or at least about 50%, or more, compared to the arterial compliance in the absence of treatment with re" . . . .