The first study I would do after that would be to obtain all the components of the vaccine individually and test those one by one in the same conditions. The depending on the results you try combinations if you can't pinpoint it to a single component
This got flagged yesterday and I was pretty disappointed by that. The single post said it was FUD and linked a different study, which was on sperm, not eggs. And this study on rats is about a publication in the journal of virology, which I assume raises it above the level of FUD.