“Rather, three stages of FA (early, middle, late) were defined and vitellogenic follicles showed two distinct morphological types of FA: yolky and cystic. Yolky FA was found in 21/30 (70%) animals, while cystic FA co-occurred in 9/30 (30%) of the animals.”…
https://pubmed.ncbi.nlm.nih.gov/38215629/
https://pubmed.ncbi.nlm.nih.gov/38215629/