oogenesis stage S9 [FBdv_00005269]

Oogenesis stage that begins when the border cells begin to migrate. During this stage: the oocyte is about 1/3 the length of the egg chamber with its nucleus located antero-dorsally; follicle cell migration results in an anterior to posterior gradient of follicle cell thickness with posterior cells being thicker (-> columnar) and posterior cells thinner ( -> squamous); border cell migration begins and ends; secretion of vitelline membrane begins.

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Stage
FBdv

oogenesis stage S9

ID: FBdv_00005269

Stage

Oogenesis stage that begins when the border cells begin to migrate. During this stage: the oocyte is about 1/3 the length of the egg chamber with its nucleus located antero-dorsally; follicle cell migration results in an anterior to posterior gradient of follicle cell thickness with posterior cells being thicker (-> columnar) and posterior cells thinner ( -> squamous); border cell migration begins and ends; secretion of vitelline membrane begins.

Temporal ordering number - 10090.

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## Classification

developmental stage

Relationships

immediately preceded by: oogenesis stage S8
substage of: oogenesis

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