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.
In women with a regular cycle, normal ovary functioning releases one egg about every 25â28 days. Although the average time between periods varies depending on the woman, especially during puberty and the perimenopause periods, most women will have their periods once monthly when theyâre in good health.