# Insert another slide between a pause in beamer

I would like to have in beamer something like

\begin{frame}
The two main reasons are :
\begin{itemize}
\item First reason
\pause
\item Second reason
\end{itemize}
\end{frame}


But I would like to insert an image to illustrate the first reason, that would be on another slide, without altering the display of my presentation.

I would therefore like to have

• Slide n : slide a with first item shown
• Slide n+1 : slide b with an image to illustrate this first item
• Slide n+2 : slide a with the two items displayed

How would it be possible ? And additionnaly would it be possible for the slide b not to be numbered ?

like this?

\documentclass{beamer}

\begin{document}

\begin{frame}<1>[label=blub]
The two main reasons are :
\begin{itemize}
\item First reason
\pause
\item Second reason
\end{itemize}
\end{frame}