Short communication: Origin, development and ultrastructure of boar spermatozoa with folded tails and with two tails

S. Bonet, M. Briz, A. Fradera, J. Egozcue

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    24 Citations (Scopus)

    Abstract

    Speramtozoa from the three epididymal regions (head, body and tail) of healthy and sexually mature boars been examined by light miroscopy, and scanning and transmission elctron and internal morphologies of aberrant spermatozoa with folded tails and spermatozoa with one or two heads and two fused tails and spermatozoa with one or two heads and two fused tails have been established. A count carried out in each region of the epididymis indicated that significant differences(P >0.01) exist in the frequencies of each type of malformation and the epididymal region from which the spermatozoa in the cauda of the epididymis from immature spermatozoa that have not ejected the distal cytoplasmic droplet. The plasma membrane which covers the main piece is fused with the membranes of the midpiece, the connecting piece and the head. The fibrous sheath deforms the connectiong piece and the head. The fibrous sheath deforms the mitochondrial sheath and isplaced between the plasma membrane and the postacrosomal dense lamina. Spermatozoa with one head and two fused tails originate in the epididyaml body from spermatozoa with one head and two unfused tails coming from the cephalic region of the edididymis. Spermatozoa with two heads and two fused tails originate in the cephalic region of the epididymis by head-to-head agglutination of two spermatozoa with two fused tails increases as they progress through the epidididymal duct. Their tails, parallel in monocephalic spermatozoa and helicoid in bicephalic spermatozoa, have two complete axonemal axes. In their midpiece, the mitochondrial sheaths of the two axes are fused, producing an 8-shapedsheath. © 1992 Oxford University Press.
    Original languageEnglish
    Pages (from-to)523-529
    JournalHuman Reproduction
    Volume7
    Issue number4
    DOIs
    Publication statusPublished - 1 Jan 1992

    Keywords

    • Aberrant spermatozoa
    • Abnormal sperm
    • Epididymis
    • Maturation
    • Sus domesticus

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