Looking on the internet deeply has found these results:

in the initial stage is the most popular phrase on the web.

at the initial stage 1143,000 results on the web	in the initial stage 1177,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
year A 73 up ... 12. doi: 10.1002/anie.200804743. Nucleation: what happens at the initial stage? Zhang TH(1), Liu XY. Researchers at the initial stage of their career. Researchers at the initial stage of their career. Spodbujanje raziskovalcev na začetku kariere. The idea of the call ... initial stage/phase: At the initial stage of the project not everyone had access to a computer. initial reaction/response/impression: My initial reaction was to panic. Angew Chem Int Ed Engl. 2009;48(7):1308 old male presented with a glioblastoma that was detected at the initial stage in the developmental process. He suffered cerebral infarction. Follow	Nucleation and growth in the initial stage of metastable titanium disilicide formation. Z. Ma, Y. Xu, and L. Ii. Allen. Department of Materials Science and ... J Microbiol. 2008 Apr;46(2):174 93. Epub 2006 Feb 8. Roles of neuraminidase in the initial stage of influenza virus infection. Ohuchi M(1), Asaoka N, Sakai ... Microbes Infect. 2006 Apr;8(5):1287 82. doi: 10.1007/s12275 008 0032 ... these metrics has failed. The full text of this article is not currently available. Nucleation and growth in the initial stage of metastable titanium disilicide formation.

at the initial stage

1143,000 results on the web

in the initial stage

1177,000 results on the web

More popular!

year
A 73
up ...
12. doi: 10.1002/anie.200804743. Nucleation: what happens at the initial stage? Zhang TH(1), Liu XY.
Researchers at the initial stage of their career. Researchers at the initial stage of their career. Spodbujanje raziskovalcev na začetku kariere. The idea of the call ...
initial stage/phase: At the initial stage of the project not everyone had access to a computer. initial reaction/response/impression: My initial reaction was to panic.
Angew Chem Int Ed Engl. 2009;48(7):1308
old male presented with a glioblastoma that was detected at the initial stage in the developmental process. He suffered cerebral infarction. Follow

Nucleation and growth in the initial stage of metastable titanium disilicide formation. Z. Ma, Y. Xu, and L. Ii. Allen. Department of Materials Science and ...
J Microbiol. 2008 Apr;46(2):174
93. Epub 2006 Feb 8. Roles of neuraminidase in the initial stage of influenza virus infection. Ohuchi M(1), Asaoka N, Sakai ...
Microbes Infect. 2006 Apr;8(5):1287
82. doi: 10.1007/s12275
008
0032
... these metrics has failed. The full text of this article is not currently available. Nucleation and growth in the initial stage of metastable titanium disilicide formation.