Thanks for posting your query.
Normal procedure of ovulation is Primordial follicle- Primary follicle - Secondary follicle- Mature follicle- Ovulation.
After ovulation, follicular remnants forms a corpus luteum
In some instances hormonal
stimulation causes Corpus luteum to continue to grow.
This is called ovarian new growth.
Investigations like Ultrasound
Hope I have answered your query.
Wishing you good health.