Abstract
Objective: Our aim was to assess the effect of the day of ovum retrieval on outcome in an IVF program scheduled for weekday-only ovum retrievals.
Design: This was a retrospective study of patients who underwent transvaginal ultrasound-guided ovum retrieval (TVUS-OR) in an IVF program from August 10, 1992, to April 30, 1993.
Setting: A university-based tertiary referral hospital center was the setting.
Participants and Methods: All patients (n=501) who underwent TVUS-OR were divided into three groups: (1) patients who underwent TVUS-OR on Monday; (2) patients who underwent retrieval on Tuesday, Wednesday, or Thursday; and (3) patients who underwent retrieval on Friday. All patients were induced by the same controlled ovarian hyperstimulation protocol, which consisted of a GnRH analogue “flare-up” followed by parenteral menotropins, after a scheduled oral contraceptive-induced menses. Patients and cycle characteristics in the three groups were compared and clinical outcome was evaluated.
Results: The similarity of patients and cycle characteristics confirmed the uniformity of the three groups. No difference was found in any of the clinical outcomes. However, in the first half of the program, we revealed a trend in which patients at high risk for ovarian hyperstimulation syndrome, requiring freezing all embryos and not allowing transfer during the treatment cycle, occurred more commonly in women whose retrieval occurred on Monday. This trend disappeared in the second half of the analysis.
Conclusions: In an in vitro fertilization program in which ovum retrievals occurred only on weekdays, no significant difference in outcome was found in patients undergoing ovum retrieval on Monday or Friday versus midweek. In addition to significant savings by eliminating weekend retrievals, IVF outcome is not compromised.
Key words: In vitro fertilization, scheduled oocyte retrieval, controlled ovarian hyperstimulation
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