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16S ribosomal ribonucleic acid (rRNA) gene polymerase chain reaction (PCR) bacterial quantification in placenta (yellow), decidua (red), fetal tissue (blue), and PBS wash (black) samples. The tissue samples are in order of increasing gestational age from left to right. Post-perfusion (10 weeks gestational age and above) placental and decidual samples are underlined. P, placenta; D, decidua; G, gut (intestine); S, spleen; L, liver; PBS, phosphate-buffered saline.
