Template:Follicle class collapse table

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Human Ovarian Follicle Classification  
Class Alternate nomenclature Type Number of Cells Size (diameter µm) Size ultrasound (mm)
primordial follicle small 1, 2, 3 25 less than 50
primary follicle preantral 4
5
26 - 100
101 - 300
up to 200
secondary follicle antral
small antral
large antral

6
7

3001 - 500
501 - 1000
500
1000 - 6000
less than 18
preovulatory follicle Graafian 8 greater than 1000 greater than 6000 18 – 28
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