Abstract
Summary
A significant elongation of the interpubic ligament occurs in the pregnant little brown bat (Myotis lucifugus). Examined immediately after delivery, the mean ligament length measured 2.01 as compared with 0.52 mm in the non-pregnant bat. Treatment of non-pregnant female bats with es-tradiol induced a mean pubic separation of 0.78 mm, while treatment with ECP and relaxin induced a mean separation of 1.03 and 1.25 mm with 5 and 10 GPU of relaxin, respectively. It is concluded that separation of the pubic symphysis with the elongation of the interpubic ligament occurs during pregnancy in the little brown bat and after treatment with ECP and relaxin.
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