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Human Reproduction, Vol. 17, No. 5, 1306-1310, May 2002
© 2002 European Society of Human Reproduction and Embryology

Embryonic platelet-activating factor: an indicator of embryo viability*

W.E. Roudebush,1, J.D. Wininger, A.E. Jones, G. Wright, A.A. Toledo, H.I. Kort, J.B. Massey and D.B. Shapiro

Reproductive Biology Associates, Atlanta, Georgia, 30342, USA

BACKGROUND: A definitive need exists to identify a biomarker of embryonic viability. Platelet-activating factor (PAF) production by human embryos is related to pregnancy potential. METHODS: Conditioned embryo culture media were obtained following conventional IVF on day 3, with PAF levels and pregnancy outcomes correlated. RESULTS: Overall pregnancy rate was 68% (17/25) with a mean of 84.1 (± 8.5) pmol/l/embryo PAF level. PAF levels ranged from a 216.4 pmol/l/embryo (pregnant) to a 3.7 pmol/l/embryo (not pregnant). There was a significant difference (P < 0.05) in PAF content between pregnant (92.1 ± 9.5 pmol/l/embryo) and non-pregnant groups (52.5 ± 16.6 pmol/l/embryo). Patients were categorized into three groups based upon PAF levels: low (<=5 pmol/l/embryo); medium (51–100 pmol/l/embryo) and high (>100 pmol/l/embryo). The low (60%) group had a significantly (P < 0.05) lower pregnancy rate than either the medium (85%) or high (89%) groups. A receiver–operator characteristic curve predicted a cut-off limit of 45 pmol/l/embryo for PAF content in human embryo conditioned culture media. CONCLUSIONS: The data demonstrate a correlation between PAF levels in human embryo conditioned culture media and pregnancy outcome. Additionally, as embryonic PAF levels increase so does the corresponding pregnancy rate. Therefore, PAF may be used as an indicator of embryo viability and for predicting pregnancy outcome.

Key words: embryo culture/embryo development/platelet-activating factor/pregnancy/viability

1 To whom correspondence should be addressed. Email: Roudebush{at}rba-online.com

* Presented, in part, at the Annual meeting of the European Society of Human Reproduction and Embryology (ESHRE 2001), Palais de Beaulieu Congress and Exhibition Centre, Lausanne, Switzerland, July 1–4, 2001


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