Near-birth experience

"[1] Psychiatrist Stanislav Grof, in 1954 researched LSD in Prague, and after 1967, he explored ketamine, and other methods for exhibiting non-ordinary states of consciousness like holotropic breathing.

[2] In 1979, science writer Carl Sagan also supported the hypothesis that near-death experiences are memories of birth.

The parapsychologist Barbara Honegger (1983) wrote that the out-of-body experience may be based on a rebirth fantasy or reliving of the birth process based on reports of tunnel-like passageways and a cord-like connection by some OBErs which she compared to an umbilical cord.

[2] Psychologist and skeptic Susan Blackmore has claimed that the near-birth experience hypothesis is "pitifully inadequate to explain the NDE.

"[5] Notable skeptic Michael Shermer has also criticized the hypothesis and concluded that "there is no evidence for infantile memories of any kind.