How to cite this article:
Sheikhi O, Golsorkhtabaramiri M, Esmaeilzadeh S, Mahouti T, Heidari FN. Reproductive outcomes of vitrified blastocyst transfer in modified natural cycle versus mild hormonally stimulated and artificial protocols: A randomized control trial. JBRA Assist. Reprod. 2018; 22:221-7.