Sometimes, a small sample of tissue may be taken with small tools inserted through the vagina during a transvaginal ultrasound. In all three types of pelvic ultrasound, the transducer sends the reflected sound waves to a computer, which makes them into a picture that is shown on a video screen.
Before birth, a fetus starts with around 2 million eggs in each ovary. Those eggs are trimmed down over time, and a girl is born with around 300,000 eggs in each ovary. She â¦normally releases 1 egg a month during her fertile years.
As the other follicles disappear new ones will emerge to replace them in preparation for the next cycle. This means that the ovary maintains a constant number of small follicles throughout the cycle. In PCOS, the ovary contains 2 - 3 times the normal number of follicles (usually more than 12) in each ovary. This happens as a result of failure of selection of a leading follicle i.e. none of the follicles grows to reach maturation.