我国有关部门曾提出妇女在月经期妊娠期和哺乳期(简称“三期”)应注意加强劳动保护。因为妇女在月经期的身体抵抗力相对下降;在妊娠和哺乳期妇女的身体新陈代谢加快,呼吸与循环机能增加,心、肝、肾器官生理负荷加重。这些变化特点都是机体的防卫能力下降,易受有毒有害物质侵 Relevant departments of our country have suggested that women should pay attention to intensifying labor protection in the period of gestation and lactation during menstruation (referred to as the “third phase”). Because women’s body resistance in menstrual period relative decline; in pregnancy and breast-feeding women’s body metabolism, breathing and circulatory function increased, heart, liver and kidney physiological load increased. These changes are characterized by the body’s defensive ability to decline, vulnerable to the invasion of toxic and harmful substances