Yes, it's possible. Also, this fact would explain the origin of the non-identical twins. In these situations, the fertilization of two different eggs by two sperm occurs, which is known as super-fertilization.
Marta Barranquero Gómez
Graduated in Biochemistry and Biomedical Sciences by the University of Valencia (UV) and specialized in Assisted Reproduction by the University of Alcalá de Henares (UAH) in collaboration with Ginefiv and in Clinical Genetics by the University of Alcalá de Henares (UAH).