Ultrastructure of a 4-cell human embryo developed in vivo

J. Pereda, S. Cheviakoff, H. B. Croxatto

Resultado de la investigación: Article

11 Citas (Scopus)

Resumen

The infrastructure of a 4-cell human embryo undergoing development in vivo is described. The embryo recovered from the Fallopian tube 130 h after a single episode of intercourse and 70 h after the luteinizing hormone peak in plasma, was partially surrounded by cumulus cells. The blastomeres, of even size, were nucleated and had a similar distribution of cytoplasmic organelles. No signs of abnormality or cellular degeneration were observed. Transmission electron microscopy of serial sections revealed the presence of primitive desmosomes between cells, abundant vesicles within the blebs of the outer sheet of the nuclear membrane, blebbing of the inner sheet of the nuclear membrane and close association between the inner sheet of the nuclear membrane and the intranuclear annulate lamellae. Nucleolar precursors lacking the structural organization of mature nucleoli were also found. Similarities and differences between this and other pretmplantation human embryos reported earlier are analysed.

Idioma originalEnglish
Páginas (desde-hasta)680-688
Número de páginas9
PublicaciónHuman Reproduction
Volumen4
N.º6
EstadoPublished - ago 1989

Huella dactilar

Ultrastructure
Nuclear Envelope
Embryo
Membrane
Embryonic Structures
Blister
Membranes
Cell
Cumulus Cells
Nucleolus
Blastomeres
Desmosomes
Fallopian Tubes
Hormones
Vesicles
Transmission Electron Microscopy
Degeneration
Luteinizing Hormone
Precursor
Organelles

ASJC Scopus subject areas

  • Statistics, Probability and Uncertainty
  • Applied Mathematics
  • Physiology (medical)
  • Reproductive Medicine
  • Obstetrics and Gynaecology
  • Rehabilitation
  • Developmental Biology
  • Physiology

Citar esto

Pereda, J. ; Cheviakoff, S. ; Croxatto, H. B. / Ultrastructure of a 4-cell human embryo developed in vivo. En: Human Reproduction. 1989 ; Vol. 4, N.º 6. pp. 680-688.
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Pereda, J, Cheviakoff, S & Croxatto, HB 1989, 'Ultrastructure of a 4-cell human embryo developed in vivo', Human Reproduction, vol. 4, n.º 6, pp. 680-688.

Ultrastructure of a 4-cell human embryo developed in vivo. / Pereda, J.; Cheviakoff, S.; Croxatto, H. B.

En: Human Reproduction, Vol. 4, N.º 6, 08.1989, p. 680-688.

Resultado de la investigación: Article

TY - JOUR

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AU - Pereda, J.

AU - Cheviakoff, S.

AU - Croxatto, H. B.

PY - 1989/8

Y1 - 1989/8

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AB - The infrastructure of a 4-cell human embryo undergoing development in vivo is described. The embryo recovered from the Fallopian tube 130 h after a single episode of intercourse and 70 h after the luteinizing hormone peak in plasma, was partially surrounded by cumulus cells. The blastomeres, of even size, were nucleated and had a similar distribution of cytoplasmic organelles. No signs of abnormality or cellular degeneration were observed. Transmission electron microscopy of serial sections revealed the presence of primitive desmosomes between cells, abundant vesicles within the blebs of the outer sheet of the nuclear membrane, blebbing of the inner sheet of the nuclear membrane and close association between the inner sheet of the nuclear membrane and the intranuclear annulate lamellae. Nucleolar precursors lacking the structural organization of mature nucleoli were also found. Similarities and differences between this and other pretmplantation human embryos reported earlier are analysed.

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KW - Human embryo

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JF - Human Reproduction

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