title: A comparison of the transabdominal and transvaginal methods of ultrasound-guided aspiration of pre-ovulatory oocytes for in vitro fertilisation.
abstract: The efficiency of two methods of ultrasound-guided aspiration of pre-ovulatory oocytes was compared in 238 treatment cycles, of which 166 were by the transabdominal-transvesical (TA) route and 72 by the transvaginal (TV) route. Successful collection of at least one oocyte was achieved in 86% of TA attempts and in 97% of TV attempts. Significantly less oocytes were collected from follicles by the TA methods than by the TV methods: 374 oocytes were obtained from 797 follicles (46% recovery) and 242 oocytes from 338 follicles (72% recovery), respectively. Although fertilisation occurred more frequently in TA-recovered oocyte (70% versus 54%), the incidence of cleavage per inseminated oocytes collected by these TA and TV methods was similar (49% versus 44%, respectively). Results of this study therefore suggest that the TV method is superior to the TA approach for oocyte recovery.
authors.affiliation: Department of Obstetrics and Gynaecology, Faculty of Medicine, Chinese University of Hong Kong.
authors.forename: K R
authors.initials: KR
authors.lastname: Mao
authors.forename: P P
authors.initials: PP
authors.lastname: Tam
authors.forename: E P
authors.initials: EP
authors.lastname: Loong
authors.forename: H C
authors.initials: HC
authors.lastname: Lee
authors.forename: Y F
authors.initials: YF
authors.lastname: Wong
authors.forename: T
authors.initials: T
authors.lastname: Chiu
mesh_terms: D000328:Adult; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D010535:Laparoscopy; D009865:Oocytes; D014465:Ultrasonics