The reproductive biology of slender blindsnakes is poorly known. All species are believed to be oviparous, but detailed data are available only for two South African species (Lepto-typhlops conjunctus and L. scutifrons) and two North American species (L. dulcis and L. humilis). In these subtropical forms, reproduction is highly seasonal, with courtship and mating occurring in the spring and oviposition occurring in the summer. Clutch size typically ranges between two and seven eggs. However, some species occasionally deposit clutches consisting of only a single egg, and one Latin American species (L. goudotii) is known to produce clutches of up to 12 eggs. The elongate, thin-shelled eggs are generally 0.6-1 in (1.5-2.5 cm) in length, but measure only 0.08-0.16 in (0.2-0.4 cm) in width. Natural incubation times are unknown, but one clutch of L. humilis eggs incubated in captivity at 86°F (30°C) hatched after 94 days. Hatchling size appears to vary widely between species, ranging from less than 2.4 in (6.1 cm) in some small species to over 4.3 in (11 cm) in larger species.
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