Shieldtail snakes are viviparous, producing relatively small numbers of relatively large young. The largest clutch size recorded is nine for oviductal eggs in Uropeltis, but litter sizes for most species range from two to five, depending on the size of the female. Reproductive seasons and reproductive behavior are poorly known. Young for different species have been recorded as being found anywhere from March to September, and females with embryos have been collected in most of the intervening months. In most species embryos are found in the right oviduct, but in a few species (e.g., U. phipsonii) embryos have been found in the left oviduct.
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