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Supernumerary microtubules and prolongation of the middle piece in two infertile patients
International Journal of Fertility
|January 1, 1983
Abstract:
A new type of sperm abnormality was described in two patients. There was at the same time a high percentage of immotile spermatozoa, supernumerary microtubules organized in more or less complete axonemes, and prolongation of the middle piece, whose mitochondria retain their normal enzymatic activity.
Insights
A novel sperm defect was identified in two patients, characterized by immotile sperm and abnormal microtubule arrangements. This unique sperm abnormality impacts motility and sperm structure.
Area of Science:
- Reproductive Biology
- Human Genetics
- Cell Biology
Background:
- Spermatozoa are essential for male fertility.
- Abnormalities in sperm structure and function can lead to infertility.
Observation:
- Two patients presented with a previously undescribed sperm abnormality.
- A high percentage of immotile spermatozoa was noted in both cases.
Findings:
- The observed sperm abnormality included supernumerary microtubules organized into incomplete axonemes.
- A significant finding was the prolongation of the sperm's middle piece.
- Mitochondria within the elongated middle piece maintained normal enzymatic activity.
Implications:
- This discovery expands the known spectrum of sperm pathologies.
- Understanding this specific defect may offer new insights into male infertility causes.
- Further research could explore the genetic and molecular basis of this sperm abnormality.