title: Surface area/volume ratio and growth equation of the human early embryo.
abstract: A study of the S/V ratio and growth equation of 49 oocytes and 120 human embryos was carried out. The S/V ratio of the internal and external limits of the zona remains unchanged during successive cleavages. The mean blastomere increases 22% its S/V ratio after each division. The mean blastomere growth equation for the 2-cell to 8-cell stages follows the expression y = 1.271 x1.021 (y = longest and x = smallest diameter), but the results obtained for the whole embryo do not coincide with those resulting from the application of the growth equation.
authors.affiliation: Unit of Human Reproduction, Clinica Nuestra Señora de Belen, La Coruña, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Maneiro
authors.forename: A
authors.initials: A
authors.lastname: Ron-Corzo
authors.forename: J
authors.initials: J
authors.lastname: Julve
authors.forename: V J
authors.initials: VJ
authors.lastname: Goyanes
mesh_terms: D001757:Blastomeres / Q000166:cytology; D004622:Embryo, Mammalian / Q000033:anatomy & histology*; D005314:Embryonic and Fetal Development; D006801:Humans; D008954:Models, Biological; D009865:Oocytes