Table 4 Placental abnormalities in placentae of COVID-19 positive mothers in retrieved studies
Type of Placental Abnormalities | Number (n) | Percentage of abnormalities to Total number of abnormal placentae | Percentage of abnormalities to Total number of examined placentae |
|---|---|---|---|
Changes in Placental weight | |||
 Small Placenta | 3 | 4.8 | 2.6 |
 Large Placenta | 1 | 1.6 | 0.8 |
Microscopic Changes | |||
 Delayed maturation of villous tree | 1 | 1.6 | 0.8 |
 Terminal villi (capillary congestion and focal microchrangiosis) | 1 | 1.6 | 0.8 |
 Villous agglutination | 1 | 1.6 | 0.8 |
 Evidence of Thrombotic tendency in Villous apparatus: Multiple organizing intervillous hemorrhage /thrombi/Avascular Villi/ Fibrosis | 40 | 64 | 35 |
 Chronic intervillositis | 3 | 4.8 | 2.6 |
 Funisitis | 1 | 1.6 | 0.8 |
 Infiltration with Inflammatory cells | 4 | 6.4 | 3.5 |
 Defective placental barrier | 7 | 11.4 | 6.2 |
 Placental Swab positive for SARS CoV-2 | 17 | 27.4 | 15 |
 Total number of Placentae found with abnormalities | 62 |  | 55 |
 Total Number of examined placentae | 112 |  |  |