The phrase "at an intermediate stage" is correct and usable in written English.
You can use it to describe a point in a process or development that is neither the beginning nor the end, but somewhere in between.
Example: "The project is currently at an intermediate stage, where we are evaluating the results of the initial tests before proceeding further."
Alternatives: "in a transitional phase" or "at a mid-point".
An activated B cell at an intermediate stage of differentiation.
Time lapse of axon outgrowth at an intermediate stage of culture at the ALI.
Interleukin-6- and leukemia inhibitory factor-induced terminal differentiation of myeloid leukemia cells is blocked at an intermediate stage by constitutive c-myc.
This paper describes the project at an intermediate stage where some testing has been completed and the construction of the complete pack system is well under way.
Jakarta had entered the suburbanization stage, Metro Manila was still at an early stage of urbanization, and Bangkok was at an intermediate stage between Jakarta and Metro Manila.
At an intermediate stage, cross-sectional analyses can be performed, to be compared with the experimental tests, and to understand the interaction between a single bridge deck strip and the wind flow.
The SQUID readout cables are run via an intermediate stage at 4.2 K.
In our study, we distinguished between early time points (less than 42 hr), equivalent to an exponentially growing population, when we observed low nuclear CIN and an intermediate stage at 4 d, when most cells are PM, but the differentiation step described has not yet taken place; at this stage, rho0 cells already show high nuclear CIN.
However, it seems entirely plausible that a two-letter code could evolve from the four-column code, or at least that there was an intermediate stage with around 10 amino acids where almost all amino acids were encoded by four-codon families and not two-codon families.
These observations suggest that Nf1 plays a robust role in constraining BG proliferation specifically at an intermediate precursor stage (Stage II), but not during earlier or later stages (Stage I or Stage III).
LSCC patients being at an early disease stage (TNM stage I) displayed, also, very elevated DDC expression, in comparison with patients diagnosed at an intermediate (TNM stage II) or an advanced stage (TNM stage III) (p = 0.027).
