title: Peritoneal pregnancy with massive hemoperitoneum in early gestation: two case reports.
abstract: Peritoneal pregnancy may cause severe abdominal bleeding without genital bleeding as early as the fifth week of gestation. Awareness that pregnancy can exist in unusual locations is imperative.
authors.affiliation: Department of Obstetrics and Gynecology, Keio University School of Medicine 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Azumi
authors.initials: A
authors.lastname: Miyauchi
authors.affiliation: Department of Obstetrics and Gynecology, Keio University School of Medicine 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Mitsutoshi
authors.initials: M
authors.lastname: Yamada
authors.affiliation: Department of Obstetrics and Gynecology, Eiju General Hospital 2-23-16 Higashiueno, Taito-ku, Tokyo, 110-0015, Japan.
authors.forename: Masataka
authors.initials: M
authors.lastname: Furuya
authors.affiliation: Department of Obstetrics and Gynecology, Keio University School of Medicine 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Satoko
authors.initials: S
authors.lastname: Matsumura
authors.affiliation: Department of Obstetrics and Gynecology, Keio University School of Medicine 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Murayama
authors.affiliation: Department of Obstetrics and Gynecology, Keio University School of Medicine 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Yoshimura
authors.affiliation: Department of Obstetrics and Gynecology, Keio University School of Medicine 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Mamoru
authors.initials: M
authors.lastname: Tanaka
keywords: Diagnosis; early pregnancy; human; primary peritoneal pregnancy