"extent of migration" is correct and usable in written English.
You could use this phrase when talking about the degree to which people or animals move from one place to another. For example, "Scientists are still trying to understand the full extent of migration of whales."
The extent of migration of ECFCs was evaluated by counting the migrated cells in 6 random high-power (×100) microscopic fields.
The extent of migration was, however, 150 560-fold lower for copper, cobalt and barium than for zinc.
The extent of migration depended on the molecular weight of grafted polystyrene on the surface of MWCNT.
c, Quantification of extent of migration, with percentage of somata in layers II/III (dark colours in graph) versus somata still en route in deeper layers (light colours in graph), as schematized above.
David Cameron and Cabinet Ministers have refused to be drawn on any projections on the possible extent of migration from the European Union's two newest member states when restrictions on their movement of travel are scrapped in January.
The cells were visually classified into four categories on the basis of extent of migration such as undamaged (UD), low damage (LD), moderate damage (MD) and high damage (HD).
The EASM is characterized by a seasonal northwestward migration of its precipitation front, and the timing and extent of the migration are associated with migration of the westerly jet axis (Tada et al. 2016).
However, mutations in sdn-1 /Syndecan affected the extent and direction of AQR migration and had a weak effect on the extent of PQR migration.
Little wonder, then, the extent of economic migration.
Is the government covering up the true extent of European migration?
They differ mainly from one another by the method and extent of their migration.
