Ultrasound tracking of the movement of embryo-associated air bubbles on standing after transfer

Woolcott, Robert; Stanger, James

doi:10.1093/humrep/13.8.2107

Cited by 71 publications

(29 citation statements)

References 12 publications

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“…Woolcott and Stanger [7] showed that immediate ambulation shortly after embryo transfer does not influence the final position of embryo-associated air bubble. But there were no studies comparing air bubble location at transfer and a short period later, in patients remaining in the horizontal position and immediately ambulated patients.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonographic Evidence that Bedrest after Embryo Transfer Is Useless

Lambers¹,

Lambalk²,

Schats³

et al. 2009

Gynecol Obstet Invest

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Background: To demonstrate the effect of immediate ambulation after embryo transfer on the intrauterine location of the transfer content. Methods: Prospective observational randomized controlled study. Results: Fifty-seven patients (47.5%) had one air bubble at transfer and after 15 min change in position: group A (bedrest) 2.69 mm, group B (immediate ambulation) 2.00 mm (p = 0.511). The distance from the fundus declined by 26% in group A and 15% in group B (p = 0.229). Twenty-eight patients (23.3%) had two air bubbles at transfer and after 15 min: average change in position of the first air bubble: group A 3.07 mm, group B 1.80 mm (p = 0.282); average change in position of the second air bubble: group A 2.69 mm, group B 1.80 mm (p = 0.450). The distance from the fundus for the first air bubble declined by 2% in group A and 18% in group B (p = 0.593) and for the second air bubble by 22% in group A and 15% in group B (p = 0.711). Conclusions: This study demonstrates that the transfer content is not affected by the immediate ambulation after transfer, illustrating why there is no rationale for bedrest after transfer.

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Section: Introductionmentioning

confidence: 99%

Ultrasonographic Evidence that Bedrest after Embryo Transfer Is Useless

Lambers¹,

Lambalk²,

Schats³

et al. 2009

Gynecol Obstet Invest

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show abstract

“…Some showing an improvement in outcome (Al-Shawaf et al, 1993;Ivanovski et al, 2006;Kan et al, 1999;Kojima et al, 2001;Woolcott et al, 1998 ), others demonstrating no difference De Camargo et al, 2004;Garcia-Velasco et al, 2002;Li et al, 2005;Lindheim et al, 1999;Mirkin et al, 2003;Prapas et al, 1995 ) and others with mixed results (Fisser et al, 2006;Hurley et al, 1991;Prapas et al, 2001). No study has shown a worsening of outcome when ultrasonography is used.…”

Section: Resultsmentioning

confidence: 99%

The Role of Ultrasound in the Evaluation of Endometrial Receptivity Following Assisted Reproductive Treatments

Ivanovski¹

2012

In Vitro Fertilization - Innovative Clinical and Laboratory Aspects

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“…Of all embryo(s) that implant successfully, 81% does so in the area where the air bubbles were initially seen on embryo transfer [28]. It is demonstrated that the air bubbles did not move after immediate ambulation after transfer in 94.1% of the cases [37] and this is confirmed by our study group [38]. We agree there is a lack of knowledge about positioning of the embryo(s) during and after embryo transfer in the uterine cavity, independently using a simple syringe or a new device.…”

Section: Discussionmentioning

confidence: 99%

Embryo Transfer with Controlled Injection Speed to Increase Pregnancy Rates: A Randomized Controlled Trial

Caanen

Houwen²,

Schats³

et al. 2016

Gynecol Obstet Invest

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Background/Aims: Catheter injection speed affects depth and placement of the embryo into the uterine cavity and is shown to be highly variable in, and between, subjects in a manually performed embryo transfer. In an effort to standardize the injection speed during embryo transfer, we developed an automated transfer pump: the pump-regulated embryo transfer (PRET) device. In this randomized controlled trial, we aimed to investigate if standardization of the injection speed and pressure with this PRET results in a better controlled positioning of the transferred embryo(s). Methods: Five hundred ninety-nine in-vitro fertilization/intracytoplasmic sperm injection/frozen-thawed embryo transfer cycles were randomly assigned to the PRET or manual transfer. Positioning of the embryo(s) into the uterine cavity was measured with ultrasound. Results: The PRET device generates a significantly smaller variance of the positioning of the embryo(s) into the uterine cavity. This resulted in an ongoing pregnancy rate of 21% in the PRET versus 17% in the manual (p = 0.22) transfer group; frozen-thawed embryo transfers resulted in 17.5 versus 10.9% (p = 0.097), respectively. Conclusion: The PRET results in better controlled positioning of the embryo(s), and it also gives the opportunity to standardize embryo transfer. Whether the PRET may positively influence pregnancy rates, needs to be investigated in a multicenter trial.

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Ultrasound tracking of the movement of embryo-associated air bubbles on standing after transfer

Cited by 71 publications

References 12 publications

Ultrasonographic Evidence that Bedrest after Embryo Transfer Is Useless

Ultrasonographic Evidence that Bedrest after Embryo Transfer Is Useless

The Role of Ultrasound in the Evaluation of Endometrial Receptivity Following Assisted Reproductive Treatments

Embryo Transfer with Controlled Injection Speed to Increase Pregnancy Rates: A Randomized Controlled Trial

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