The patient's mother had on two occasions given birth to twins.

The woman herself had been married for six years and had borne 4 children at full term, having no difficulty in labor.

When she came under observation she computed that she had been pregnant for six months, and had had her attention attracted to the unusually large size of her abdomen.

She complained of fixed pain in the left side of the abdomen on which side she thought she was larger.

Pains set in with regularity and the labor lasted eight and three-quarter hours.