Write an article celebrating the recent race featuring fillies and mares at Del Mar, highlighting the standout performances and profiles of key horses such as Splendora and Ooty. Discuss the significance of female horses in the racing industry, both historically and in contemporary settings. Incorporate insights into the science of equine genetics and training methods that contribute to their speed and success on the track. Conclude by reflecting on the impact of events like this on promoting female athletes in the sport. Use vivid descriptions to engage readers and evoke the excitement of the race day atmosphere.