Changes in the beta-diversity during the time course of pregnancy in Dahl S and SD rats. PCoA plots representing beta-diversity during (A) early pregnancy, day 6; (B) midpregnancy, day 13; (C) late pregnancy, day 20; and (D) 1 wk postpartum, day 28. Each dot represents an individual rat. The pink ellipse represents virgin SD; the green ellipse represents pregnant SD; the blue ellipse represents virgin Dahl S; and the purple ellipse represents pregnant Dahl S. n = 6–10 female rats. Dahl S, Dahl salt-sensitive; PCoA, principle coordinates analysis; SD, Sprague Dawley.