Quantitative evaluation of capillaries in the myocardium of human embryos

On cryostat sections of hearts of human embryos and fetuses aged 7 to 20 weeks, the length, density and internal surface (area) of capillaries were studied in surface unit of the ventricular myocardium using a semi-automatic apparatus MOP AM 03. The DPP IV and ALP-positive capillary segments were evaluated separately.