Innervation and gap junction formation in the myometrium of pregnant little brown bats, Myotis lucifugus

Pregnant Myotis lucifugus were captured in mist nets set outside a large maternity colony and, in most cases, were examined 12-15 hours later. Anterior and posterior halves of uteri were pinned to dental wax and either incubated in glyoxylic acid to produce adrenergic nerve fluorescence, or fixed in buffered glutaraldehyde for electron microscopy. Blood was collected for radioimmunoassay of plasma progesterone. We found no evidence of decreased …