Merriman speaks of a woman forty years of age who had not borne a child for nine years, but who suddenly gave birth to a stout, healthy boy without being cognizant of pregnancy.

Dayral tells of a woman who carried a child all through pregnancy, unconscious of her condition, and who was greatly surprised at its birth.

Among the French observers speaking of pregnancy remaining unrecognized by the mother until the period of accouchement, Lozes and Rhades record peculiar cases; and Mouronval relates an instance in which a woman who had borne three children completely ignored the presence of pregnancy until the pains of labor were felt.

Fleishman and Munzenthaler also record examples of unconscious pregnancy.
Pseudocyesis .-- On the other hand, instances of pregnancy with imaginary symptoms and preparations for birth are sometimes noticed, and many cases are on record.

In fact, nearly every text-book on obstetrics gives some space to the subject of pseudocyesis.