Is the length of time between endometrial scratching and embryo transfer important for pregnancy success? An observational study - Ueno, Joji; Salgado, Renato de Mayrinck; Ejzenberg, Dani; Carvalho, Filomena Marino; Veiga, Eduardo Carvalho de Arruda; Soares Junior, Jose Maria; Baracat, Edmund Chada (Revista da associacao medica brasileira, 2023)