Safety of embryo cryopreservation: insights from mid-term placental transcriptional changes oleh Qin-Yu Luo, Si-Wei Zhang, Hai-Yan Wu, Jia-Ying Mo, Jia-En Yu, Ren-Ke He, Zhao-Ying Jiang, Ke-Jing Zhu, Xue-Ying Liu, Zhong-Liang Lin, Jian-Zhong Sheng, Yu Zhang, Yan-Ting Wu, He-Feng Huang