What does a 15mm left follicle adnexa mean?

A 15mm left follicle in the adnexa refers to a fluid-filled sac in the left ovary that has reached a size of 15mm, which is typical in the menstrual cycle as follicles develop prior to ovulation. This measurement indicates that the follicle is maturing and may soon release an egg. In a clinical context, it can be important for assessing ovulation status or fertility. However, further evaluation may be necessary if there are any accompanying symptoms or concerns.