So confused

Friday I went for a follicle check. Right was 10 and 12. Left was 14 and 14. Went back in today and right was 18 and 15. Left there was 20 follicles but all of them were at a 10. So my question is why would the left follicles on Friday be 14 and then all of a sudden today there are 20 of them that are at a 10.