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Hum. Reprod. Advance Access originally published online on June 3, 2004
Human Reproduction 2004 19(8):1796-1799; doi:10.1093/humrep/deh346
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Human Reproduction vol. 19 no. 8 © European Society of Human Reproduction and Embryology 2004; all rights reserved

Age and homocysteine plasma levels are risk factors for thrombotic complications after ovarian stimulation

E. Grandone1,5, D. Colaizzo1, P. Vergura1, F. Cappucci1, G. Vecchione1, A. Lo Bue2, E. Cittadini3 and M. Margaglione4

1 Unità di Aterosclerosi e Trombosi, IRCCS Casa Sollievo della Sofferenza, S. Giovanni R. (Foggia), Viale Padre Pio, 71013, 2 Centro di Biologia della Riproduzione, Palermo, 3 Cattedra di Ostetricia e Ginecologia, Istituto Materno-Infantile, Via V. Villareale, 54, 90141, Palermo and 4 Genetica Medica, Università degli Studi di Foggia, Viale Pinto, Foggia 71100, Italy

5 To whom correspondence should be addressed at: IRCCS ‘Casa Sollievo della Sofferenza’, Poliambulatorio Giovanni Paolo II Viale Padre Pio, S. Giovanni R. (Foggia), 71013, Italy. Email: grandone{at}katamail.com

BACKGROUND: The magnitude of thrombotic risk during ovarian stimulation cycles is not known. We calculated the magnitude of thrombotic risk in a cohort of women starting a new cycle of ovarian stimulation and investigated the role of inherited and acquired thrombophilia for these events. METHODS: This is an observational study involving outpatients of a clinical research centre. Consecutive women undergoing ovarian stimulation (n=305) were enrolled. Blood samples for studying inherited and acquired thrombophilia were obtained ≥2 months after the last cycle of treatment. Odds ratios (OR) and confidence intervals (CI) were determined for markers significantly associated with thrombotic events. Blood samples were analysed for inherited and acquired causes of thrombophilia (antithrombin, protein C, protein S, antiphospholipid antibodies, the Factor V Leiden and FIIA20210 mutations, the TT677 MTHFR genotype, and homocysteine plasma levels). RESULTS: Thrombotic events were observed in 4/747 cycles of ovarian stimulation, with a prevalence of 0.5%, corresponding to 1.6 per 100 000 cycles/woman. Age ≥39 years and homocysteine plasma levels above the 97.5 percentile were significantly associated with thrombotic events during IVF [OR 15.2 (95% CI 2.0–115.0) and 14.4 (1.5–141.3) respectively]. CONCLUSIONS: Age ≥39 years and mild hyperhomocysteinaemia are strongly associated with the occurrence of thrombotic events during IVF.

Key words: age/homocysteine/IVF/thrombophilia/thrombotic events


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