Strengths and limitations
Regarding the limitations, in this study, 19% of parturients reported previous spontaneous abortion, 19% of these were CMV positive in the placenta. In almost 50% of parturients CMV positive, virus was detected in cord blood had abortion history. Although there was statistical association between CMV and abortion history in bivariate analysis, it was not possible to correlate no previous episodes of poor obstetric history as a protection factor to vertical transmission or CMV presence in the last pregnancy. However, this information may be relevant in the investigation of patients at risk of vertical transmission. This result might be caused as a consequence of the sample size in the studied population.