How many passages can I perform with PromoCell Normal Human Cells?

PromoCell does not specify the number of passages that can be performed with a cell culture. Instead, we determine the number of population doublings (PDs) that can be achieved under the recommended culture conditions.
The term passage only describes the process of detaching and replating cells and does not account for differences in split ratios. As a result, the number of passages alone is not a reliable measure of a culture's expansion potential.
The optimal split ratio depends on the actual cell yield after trypsinization and the recommended seeding density. For most PromoCell cell types, typical split ratios range from 1:4 to 1:6.
As an example, when using a 1:4 split ratio (i.e. a four‑fold increase in growth surface area at each passage), approximately 15 population doublings can be achieved within 6–8 passages.
For recommended seeding densities and culture conditions, please refer to the corresponding Instruction Manual (section: Specifications).