A kit for determining for a female subject the implantation potential of embryos obtained or to be obtained by assisted fertilization is described. The kit includes at least one reagent suitable for detection of levels of FF G-CSF or FF G-CSF mRNA, such as anti-G-CSF antibody or a nucleic acid probe for detection of levels of G-CSF mRNA. The kit may also include a set of concentration standards of FF G-CSF and aspirator tips for removing an oocyte and follicular fluid.
