Background In our center we observed in preliminar studies that within pregnant SLE patients, Anti-Ro Ab carriers suffered less abortions than non-carriers.
Objectives It comes to test whether this results are statistically significant and if there is an association with other variables such as previous abortion and disease activity, described in the literature.
Methods Population of 105 SLE pregnant women, atended in our Hospital pregnancy and Lupus Unit. Anti-Ro/La Ab and antiphospholipidic Ab analysis in the 105 patients mentioned. Also analysis of the SLE activity through Lupus Activity Index in pregnancy (LAIP) and Systemic Lupus Erythematosus Disease Activity Index in pregnancy (SLPDAI) tools applied to 88 prospective pregnancies, and the influence of previous abortions.
Results 32 pregnancies with a history of previous abortion, resulting in 78.13% abortions and 21.87% births.
56 pregnancies with no prior history of abortion, resulting in 5.35% abortions and 94.64% births (p<0.0001). 44 pregnancies Anti-Ro carriers, had 22.72% abortions and 77.27% births; and of 61 pregnancies non-carriers, causes 42.62% abortions and 53.38% births; OR:0.396, CI:0166-0944; p<0.05.
Other valued Ab presence, has not been significant, neither disease activity.
Conclusions Previous abortions presence is the most negative influence on pregnancy outcome. Anti-Ro Ab presence is a protective factor of pregnancy. Disease activity does not affect pregnancy outcome, although the observed trend is to increase the abortion risk, enhancing SLPDAI value; we believe this result is determined by selecting pregnancy time in terms of disease activity.
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Disclosure of Interest None declared