Tag: genital opening

Sampling of fish eggs through catheterization (biopsy)

Review: Abdel Rahman El Gamal (Founder of the website and video channel) Determining the size (diameter) of eggs from female’s ovary by catheterization (biopsy) is being used as a criteria to determine the sexual maturation of females.  Catheters could be rigid (made of glass or hard plastic) or flexible (made of polyethylene or vinyl). The …

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