Epley reports painless labor in a patient with paraplegia.

Fahnestock speaks of the case of a woman who was delivered of a son while in a state of artificial somnambulism, without pain to herself or injury to the child.

Among others mentioning painless or unconscious labor are Behrens (during profound sleep), Eger, Tempel, Panis, Agnoia, Blanckmeister, Whitehill, Gillette, Mattei, Murray, Lemoine, and Moglichkeit.
Rapid Parturition Without Usual Symptoms .-- Births unattended by symptoms that are the usual precursors of labor often lead to speedy deliveries in awkward places.

According to Willoughby, in Darby, February 9, 1667, a poor fool, Mary Baker, while wandering in an open, windy, and cold place, was delivered by the sole assistance of Nature, Eve's midwife, and freed of her afterbirth.

The poor idiot had leaned against a wall, and dropped the child on the cold boards, where it lay for more than a quarter of an hour with its funis separated from the placenta.