MMP1 and preeclampsia: Because in all statistical tests we observed the contribution of 1G/2G MMP1 and 5A/6A MMP3 polymorphisms in the development of preeclampsia, we conduct the additional analyses focusing on simultaneous carriage of maternal (MMP1 and MMP3) or fetal (MMP1 and MMP3) or both maternal and fetal MMP1 and MMP3 gene polymorphisms and the predisposition to preeclampsia.