title: Difficulty of embryo-transfer (ET) and pregnancy rate based on the uterocervical angle.
abstract: When the angle formed by the uterine body and cervical axes (uterocervical angle) was less than 115 degrees, a catheter for embryo transfer could not be smoothly inserted into the uterine body, and so a hard catheter was used, which significantly reduced the pregnancy rate and implantation rate. When the uterocervical angle measured before embryo transfer by ultrasonography is less than 115 degrees, careful preparation, such as catheter selection for embryo transfer and the setting of a longer operation time, is necessary.
authors.affiliation: ART Clinic for Females, Kumamoto City, Kumamoto, Japan. koyama@art-kumamoto.com
authors.forename: A
authors.initials: A
authors.lastname: Komaki
authors.forename: X
authors.initials: X
authors.lastname: Qian
authors.forename: N
authors.initials: N
authors.lastname: Shibata
authors.forename: N
authors.initials: N
authors.lastname: Koyama
mesh_terms: D000328:Adult; D002404:Catheterization / Q000295:instrumentation* / Q000379:methods; D002584:Cervix Uteri / Q000033:anatomy & histology*; D004624:Embryo Transfer / Q000295:instrumentation* / Q000379:methods; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D007247:Infertility, Female / Q000628:therapy; D011247:Pregnancy; D018873:Pregnancy Rate; D012189:Retrospective Studies