What is the meaning of multiple follicles seen in right ovary?

The ovaries contain eggs (which formed in the ovary during childhood) and these are matured by the ovary (usually one at a time) in follicles which then come to the surface of the ovary and burst to release the egg into the top of the fallopian tube.

Thus if multiple follicles have been detected in an ovary, that ovary is developing more than one egg at a time - this can result non identical twins.

Usually only one follicle is developed to maturity at a time but it is possible to stimulate the ovary to produce more (using hormones) as part of interventions relating to infertility treatments.