Warm-up, ovulation, which comes first?

I think I've gotten some mixed information online, some website said warming back to summer temps gives females a hint to ovulate, but I thought the ovulations begin to be observed before warm-up??

So which comes first, warm-up or ovulations? And does warming back up mark a specific point in the breeding process or is it just getting back to normal?

You'll get some ovulations before warm up but most tend to come shortly after you warm up the room to summer temps.