Diagnostic Ultrasound - Abdomen and Pelvis

Ovaries
CYCLIC CHANGES OF OVARY
Anatomy: Pelvis
Mature follicle
Cumulus oophorus
Recently ruptured follicle
Regressing corpus luteum
Immature follicles
(Top) Transverse TV color Doppler ultrasound of the ovary demonstrates a large mature follicle with a small cyst on its wall
representing a cumulus oophorus. The size of a mature follicle can reach up to 25 mm before ovulation. (Middle) Longitudinal TV color
Doppler ultrasound of the ovary shows a dominant follicle immediately after its rupture at ovulation. Note the partially collapsed wall
resulting from loss of part of the liquor folliculi and the hypoechoic internal contents representing blood. (Bottom) Transverse TV
ultrasound of the ovary shows a regressing corpus luteum with typical hypoechoic, thick, crenulated wall, and echogenic internal
contents representing blood.
169