This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiological Changes of Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is not one of the phases of Implantation of Embryo? \nSelect and explain. \nA. Epithelialization, B. Apposition, C. Adhesion, D. Invasion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Implantation of Embryo can be divided into three phases: Apposition--initial contact of the blastocyst to the uterine wall Adhesion--increased physical contact between the blastocyst and decidua; and Invasion--penetration and invasion of syncytiotrophoblast and cytotrophoblast into decidua , inner third of the myometrium, and uterine vasculature.', 'role': 'assistant'}]