Hisaw, F.L.: Experimental relaxation of the pubic ligament of the guinea pig. Proc. Soc. Exper. Biol. and Med., 23 : 661, 1926.
2.
Felton, L.C. , Frieden, E.H., AND Bryant, H.H.: The effects of ovarian extracts upon activity of the guinea pig uterus in situ . J. Pharmacol. & Exper. Therap., 107 : 160, 1953.
3.
Sawyer, W.H. , Frieden, E.H., AND Martin, A.C.: In vitro inhibition of spontaneous contractions of the rat uterus by relaxin-containing extracts of sow ovaries . Am. J. Physiol., 172 : 547, 1953.
4.
Kroc, R.L., Steinetz, B.G., AND Beach, V.L.: The effects of estrogens, progestagens, and relaxin in pregnant and nonpregnant laboratory rodents. Ann. N. Y. Acad. Sc., 75: 942, 1959.
5.
Steinetz, B.G., Beach, V.L., AND Kroc, R.L.: The Physiology of Relaxin in Laboratory Animals. Recent progress in the endocrinology of reproduction, p. 389. Academic Press, New York, 1959.
6.
Zarrow, M.X. : Relaxin content of blood, urine and other tissues of pregnant and postpartum guinea pigs. Proc. Soc. Exper. Biol. & Med., 66: 489, 1947.
7.
Zarrow, M.X., Holmstrom, E.G., AND Sal-Hanick, H.A. : The concentration of relaxin in the blood serum and other tissues of women during pregnancy. J. Clin. Endocrinol. & Metab., 15: 22, 1955.
8.
Hall, K.: The effects of pregnancy and relaxin on the histology of the pubic symphysis in the mouse. J. Endocrinol. 5: 174, 1947.
9.
Stone, M.L. : Effects of Relaxin in the Human, Recent Progress in the Endocrinology of Reproduction, p. 429. Academic Press, New York, 1959.
10.
Casten, G.G. , AND Boucek, R.J.: Use of relaxin in the treatment of scleroderma . J. A. M. A., 166 : 319, 1958.