• Publications
  • Influence
Time-lapse videomicrographic analyses of contractions in mouse blastocysts.
  • S. Niimura
  • Medicine, Biology
  • The Journal of reproduction and development
  • 1 December 2003
Contraction has been observed in cultured blastocysts of many mammals, but little is known about the features of the contraction and its physiological role in blastocysts. The author analyzedExpand
  • 46
  • 5
  • Open Access
Sericin Accelerates the Production of Hyaluronan and Decreases the Incidence of Polyspermy Fertilization in Bovine Oocytes During In Vitro Maturation
Fetal bovine serum (FBS) has been widely used as a supplement in the maturation medium of bovine oocytes in vitro. However, serum contains many undefined factors and is potentially infectious toExpand
  • 12
  • 2
  • Open Access
Time-lapse videomicrographic observations of blastocyst hatching in cattle.
Morphological changes of cultured bovine blastocysts during hatching were observed using time-lapse videomicrography in order to investigate the patterns of the hatching process that occurred in theExpand
  • 17
  • 1
  • Open Access
Changes in the amount of proteins, glycogen and lipids in porcine oocytes during in vitro meiotic maturation
Changes in the cytoplasmic inclusions during meiotic maturation were histochemically examined in cultured porcine oocytes. The oocytes contained a small amount of protein and glycogen granulesExpand
  • 16
  • 1
The relationship between nuclear maturation and cortical granule distribution in cultured porcine oocytes
The state of nuclear maturation and the state of cortical granule (CG) distribution were observed in porcine oocytes cultured for various periods and also in those treated with olomoucine, anExpand
  • 5
  • 1
The size of perivitelline space in mouse oocytes cultured in the medium with decreased concentration of NaCl
The perivitelline space is the gap between the plasma membrane and the zona pellucida of the oocyte. Although not present in the oocytes in the germinal vesicle (GV) stage, the perivitelline space isExpand
  • 1
  • 1
  • Open Access
Changes in Cortical Granule Distribution within Bovine Oocytes during Maturation and Fertilization In Vitro
The distributional changes of cortical granules (CGs) in bovine oocytes during maturation and fertilization in vitro were histochemically examined with lectin. Lens culinaris agglutininExpand
  • 14
Developmental hormonal profiles in rdw rats with congenital hypothyroidism accompanying increased testicular size and infertility in adulthood.
Congenital hypothyroid mutant male rdw rats have enlarged testes in adulthood with dwarfism accompanied by infertility. To explain how rdw rats acquire enlarged testes in adulthood, we comparedExpand
  • 14
Amount of hyaluronan produced by mouse oocytes and role of hyaluronan in enlargement of the perivitelline space.
Production of hyaluronan (hyaluronic acid: HA) was demonstrated in denuded mouse oocytes (DOs) by the enzyme-linked immunosorbent assay, and the role of HA in enlargement of the perivitelline spaceExpand
  • 15
  • Open Access