I’m a total amateur so I’m learning every second, it’s great!
I recently acquired this book and love it:
https://forum.inaturalist.org/t/current-or-general-favorite-field-guides/656/83?u=mira_l_b
I pulled that tidbit I shared straight out of those pages. If I read it correctly then I think it would be prior to laying. @mamestraconfigurata, can you confirm?