Right behind the Gall bladder (football shaped dark object on the screen), you should start looking for something that looks like a string of pearls. I have seen follicles as small as 5 mm and as lasrge as 40 mm. Typically after about 26 mm, the females won't reabsorb, but anything is possible. They tend to ovulate near the 40 mm mark. If the female is developing strongly, she will grow about 5-6 mm per week. This is what I have learned and witnessed from Sean at Exotics by Nature. Hope that helps.