MMP1 and preeclampsia: The GMDR analysis used to calculate the interaction among 5 studied polymorphisms in predicting preeclampsia based on the gene-gene interaction in the children group has shown that the best model is containing only −1607 1G/2G MMP1 (rs1799750) nucleotide polymorphisms, with the CVC (10/10), TBA = 63.82%, and p = 0.0107.