"in the developmental stage" is a correctly used phrase in written English.
It is often used to refer to the process of something (e.g. an idea, process, technology, organism) maturing or evolving over time, either in terms of physical development or in terms of refining and improving an idea or process. For example: "This technology is still in the developmental stage, so it could take a few years before it's ready for commercial use."
In the majors, you're trying to win ballgames, and he's still in the developmental stage.
The developmental state it dreams about is still in the developmental stage.
For the past eight years Major League Baseball has sent instructors to clinics in countries where the game is in the developmental stage.
"This technology should still be considered to be in the developmental stage," said Dr. Roberta Lucas, an instructor of clinical dermatology at the Northwestern University Feinberg School of Medicine in Chicago.
One sign that the sector is still mainly in the developmental stage is that one of the most anticipated public offerings next year is expected to come from Nanosys, which despite raising $39 million last June from a group of major venture capital firms does not expect to have its first commercial product before 2006.
However, power-harvesting antennas are currently in the developmental stage.
In addition, the developmental stage of the organism greatly modifies the response of the pulmonary circulation to injury.
It is important for you to remember while you are in the developmental stages of your career that no stop is the final destination.
The aim of this study is to examine the toxicity in the developmental stages of H. elegans using the method of developmental assay according to Gopalakrishnan (2002) and Gopalakrishnan, Thilagam, and Vivek Raja (2008).
However, while the applicability and necessity of BAN have been firmly assured, the underlying technological platforms to practically realize these networks are still in the developmental stages, with many outstanding key problems to be addressed.
Its in the developmental stages.
