Left ovarian corpus luteum suggests the presence of corpus luteum cysts, the so-called corpus luteum cysts are formed after ovulation, follicle rupture will form certain corpus luteum cysts or due to the absence of ovulation directly into the luteal secretion period will also form corpus luteum cysts. Luteal cysts are physiological cysts that will return to normal after menstruation and will not affect your health. They are a clinical phenomenon that exists in most women, so don’t be overly nervous or stressed. Be sure to check the corpus luteum 3 to 5 days after menstruation to see if there is any persistence. If the left ovary also has some abnormal echoes, consider the presence of pathologic cysts rather than the corpus luteum. If it subsides, it is a normal phenomenon, do not worry too much, usually ensure enough sleep to avoid mental factors affecting menstruation.