Human Reproduction, Vol. 14, No. 11, 2886-2890,
November 1999
© 1999 European Society of Human Reproduction and Embryology
Antithyroid antibodies do not affect pregnancy outcome in women undergoing assisted reproduction *
1 Room D324, Division of Reproductive Endocrinology, Department of Obstetrics and Gynecology, 956 Court Avenue, University of Tennessee, Memphis, Tennessee 38163–2116, 2 Colorado Center for Reproductive Medicine, Englewood, CO and 3 Saint Barnabus Medical Center, Livingston, NJ, USA
The purpose of this study was to determine the association of antibodies to thyroglobulin and thyroid peroxidase and pregnancy outcome in women undergoing assisted reproductive techniques. The study included three centres and retrospectively evaluated patient sera for antithyroid antibodies, then related the results to pregnancy outcome. Enzyme-linked immunosorbant assays for thyroglobulin and thyroid peroxidase antibodies were performed using two different commercially available kits. Controls included 200 healthy women of reproductive age. Women (n = 873) who were undergoing assisted reproductive techniques for pelvic adhesions, endometriosis, ovarian dysfunction, or unexplained/other were included. All women utilized a standard regimen of gonadotrophin releasing hormone agonist down-regulation followed by ovulation induction. Embryos were cultured for 3 days, at which time embryo transfer occurred. Statistical analysis utilized the two-tailed Fisher's exact test. Antithyroid antibodies were positive in 143 of 873 (16.4%) women undergoing assisted reproductive techniques while 29 of 200 (14.5%) normal controls were positive (not significant). Deliveries were achieved in 396 of 730 (54.2%) of women who had no thyroid antibodies versus 78 of 143 (54.5%) of women who had thyroid antibodies (not significant). No difference in biochemical pregnancies (not significant) or clinical pregnancy losses (not significant) were detected. Antithyroid antibodies were found no more frequently in women undergoing assisted reproductive techniques than in normal controls. There were no differences in pregnancy outcome based on antithyroid antibody positivity in women undergoing assisted reproductive techniques. These data do not support the testing or treatment for antithyroid antibodies of women undergoing assisted reproductive techniques.
Key words: antithyroid antibodies/autoimmunity/infertility/in-vitro fertilization
4 To whom correspondence should be addressed
* This paper was presented at the 54th Annual Meeting of the American Society for Reproductive Medicine, San Francisco, CA, USA, October 4–9, 1998.
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