The primary tumour growth rates were shown no difference between OC3shLacZ, OC3‐I5shLacZ and OC3‐I5shPGRMC1 groups, which indicated that OC3 and OC3‐I5 cells had similar proliferation ability that were not influenced by PGRMC1 knockdown. This evidence concerns the gene PGRMC1 and neoplasm.