Formation of concept of decimal system in Mexican school children

The present study deals with initial formation of concept of decimal system in second year of Combination Food Processors education at primary school in Mexico (City of Puebla).Our research is based on Activity Theory conception of teaching-learning process and of gradual introduction of scientific concepts in school age.The method has been designe

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Clinical effectiveness of spindle-view intracytoplasmic sperm injection compared to conventional intracytoplasmic sperm injection in patients with poor ovarian response and previous implantation failure

Objective This study aimed to determine the clinical advantage of spindle-view intracytoplasmic sperm injection (SVICSI; a novel technology) over conventional intracytoplasmic sperm injection (cICSI) in patients with poor ovarian response (POR) and previous implantation failure.Methods The study included 37 patients who underwent SVICSI followed by

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