Analisis protein leukemia inhibitor factor (lif) leukemia inhibitor factor receptor (lif-r) pada jaringan endometrium midluteal macaca nemestrina setelah pemberian stimulasi ovarium terkendali = Analysis of leukemia inhibitor factor (lif) and leukemia inhibitor factor receptor (lif-r) protein in macaca nemestrina midluteal endometrial tissue after controlled ovarian stimulation