| MMP classification | Enzyme substrates | Cell type/tissue secretion | References |
| Collagenases | Collagenase-1 | MMP-1 | Collagen types I, II, III, VII, and X | EVTs, decidua, and uNK | [39–42] | Collagenase-2 | MMP-8 | Collagen types I and III | EVTs, decidua | [39, 43, 44] | Collagenase-3 | MMP-13 | Collagen type I | EVTs, decidua | [39, 44–46] |
| Gelatinases | Gelatinase A | MMP-2 | Collagen types I, III, IV, V, VII, and X; gelatin; fibronectin; and elastin | EVTs, decidua, and uNK | [39, 42, 44, 47–52] | Gelatinase B | MMP-9 | Collagen types I, III, IV, and V and gelatin | EVTs, decidua, and uNK | [39, 42, 44, 47–50, 52] |
| Stromelysins | Stromelysin-1 | MMP-3 | Collagen types III, IV, IX, and X; gelatin; laminin; fibronectin; and elastin | EVTs, decidua | [39, 44, 50, 53] | Stromelysin-2 | MMP-10 | Collagen types II, IV, and V; fibronectin; and gelatin | EVTs, decidua, and uNK | [39, 44, 50, 54] | Stromelysin-3 | MMP-11 | Collagen type IV | EVTs, decidua, and uNK | [39, 44] |
| | Matrilysin | MMP-7 | Fibronectin and gelatin | EVTs, decidua, and uNK | [39, 41, 42, 44, 45] |
| | Matrilysin-2 | MMP-26 | Fibronectin and gelatin | EVTs, decidua | [39, 55, 56] |
| | Metalloelastase | MMP-12 | Elastin and fibronectin | EVTs, decidua, and uNK | [39, 44, 57, 58] |
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