(1) Mature eggs pass from the oviduct along the ovipositor to be placed between leaves, along with an adhesive that attaches the eggs to the leaves and keeps the leaves together.(2) Furthermore, estrogen was found to inhibit PAI1 protein synthesis in oviductal cells.(3) In Afrixalus, the leaf-folding frog, mating pairs construct an over-water leaf nest by folding leaves together with their legs, and gluing them together with oviducal secretions.(4) Their lungs, liver, spleen, kidneys, ovaries and oviducts were all infected.(5) A special gland in the female, unique to elasmobranchs and known as the oviducal , nidamental, or shell gland, produces the egg case.(6) The researchers are focusing on differences in gene expression within cells in a special site inside the hen's reproductive tract, called the oviductal sperm-storage tubules (SSTs).(7) Thus, it is puzzling that Great Tits had about twice as much oviductal sperm.(8) Several studies have shown that mammalian embryos, exposed in vivo to hyperosmotic oviductal fluids, grow better in vitro in hyperosmotic media when provided organic osmolytes.(9) The paired eggs suggest that these dinosaurs retained two functioning ovaries and oviducts , each producing a single egg at a time.(10) The innermost parts of these ducts remain separate, and become the Fallopian tubes, or oviducts ; the lower parts fuse, and develop into the uterus and vagina.(11) In females, in the absence of the testes, the MÔö£ÔòØllerian ducts develop into the oviducts , which transport eggs from the ovaries to the uterus, while the Wolffian ducts degenerate.(12) Further, no emigrating females had oviductal eggs, suggesting total reproductive failure during that year.
