Surface area/volume ratio and growth equation of the human early embryo.
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.
Maneiro
E
E
Unit of Human Reproduction, Clinica Nuestra Señora de Belen, La Coruña, Spain.
Ron-Corzo
A
A
Julve
J
J
Goyanes
V J
VJ
D001757:Blastomeres / Q000166:cytology; D004622:Embryo, Mammalian / Q000033:anatomy & histology*; D005314:Embryonic and Fetal Development; D006801:Humans; D008954:Models, Biological; D009865:Oocytes