A negative ultrasound a few days before my period revealed a slightly stronger echo in the left ovary.

A negative ultrasound done a few days before menstruation reveals slightly strong echoes in the left ovary, which may be caused by follicles or ovarian tumors, etc.
A few days before menstruation, ultrasound found that the left ovary is slightly strong echoes, may be the left ovary follicle, it is recommended that the patient can review the ultrasound 3 to 7 days after the menstrual period.
If the result of ultrasound does not disappear and the left ovary is enlarged, it is necessary to consider the possibility of ovarian tumor, and need to do further MRI and embryo cancer examination to exclude the possibility of malignant tumor.
If the left ovary is found to be slightly echogenic on ultrasound a few days before menstruation, there may be other reasons, so it is recommended to consult a doctor in time, complete the relevant examinations, clarify the cause of the disease under the guidance of a professional doctor, and then take active targeted treatment.