Fertility basics
The emptied follicle becomes the corpus luteum and secretes progesterone for around two weeks. If pregnancy occurs, hCG from the early pregnancy keeps it working until the placenta takes over. A fluid-filled corpus luteum cyst is a normal finding on scans and usually resolves on its own.
Also known as: yellow body, corpus luteum cyst
Related Canada guides
Sources
- Society of Obstetricians and Gynaecologists of Canada (SOGC) patient information
Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.