Ultrasound scan just before ovulation, only follicles on one side - is this normal?!

[Muddysocks1]

This was a natural cycle, unmediated, not IVF. Scan happened the day after LH surgery but before I ovulated. There were only follicles on one side (and the biggest was 15mm which I think is a bit small). Is this normal, or would you expect to have follicles on both ovaries?

it’s perfectly normal, bit of info here:

Most women have two ovaries, one on the right and one on the left. During the first week or so after your period begins, both ovaries are hard at work growing follicles that could become mature eggs. However, around day 7, one egg becomes the dominant egg—let’s call her the Queen Egg—and the other follicles in both ovaries take a load off, eventually degenerating. (These otherwise “lost” eggs are the ones that are matured, retrieved, and preserved during egg freezing!) The Queen Egg continues to grow in preparation for her release around day 14.
Each month, only one ovary develops a Queen Egg. (Typically, that is. The presence of multiple Queen Eggs could mean the release of both during ovulation—resulting in the possibility of a fraternal twin pregnancy if both are fertilized!) But which ovary develops the Queen isn’t a simple left-right-left-right alternation, nor is it purely random. Multiple studies (1, 2, 3) have demonstrated that, likely due to anatomical differences between the right and left sides of the reproductive system, the right ovaryis significantly more likely to serve as the palace for your Queen Egg.

That’s so helpful, thank you!! My googling didn’t help but that really does. So the redundant side had probably withered away as the other side was leading. Phew!