I型胶原蛋白是人体皮肤的重要组成部分，其纤维束状结构为皮肤提供了强大的支撑力和韧性，帮助维持皮肤的紧致与弹润。以I型胶原蛋白为基础的美容护肤产品，适用于面部、眼周、颈部等部位，可改善肌肤屏障，抑制酪氨酸酶，减缓黑色素沉着；锁水保湿 ...

Objectives: to determine the association between vertical childbirth posture and grade II or higher perineal tears in women attended under a humanized model. Methods: 715 clinical records of humanized ...