Table 1 Sample types studied
Sample | Collection protocol/comments |
|---|---|
Air swab | Swab of the air from the clinical laboratory where the placental samples were obtained |
Sterile swab | Unopened sterile swab |
Extraction blank | Blank tubes for possible extraction/reagent contaminants |
Placenta (MS) | Basal plate biopsy obtained after removal of placental surface |
Placenta (FS) | Placental biopsy obtained after removal of placental surface |
Saliva | Collected in sterile 50-mL conical tube |
Vaginal swab | Swab inserted into maternal vagina for 30 s |