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Old 08-30-2011, 08:14 AM   #1
obur40441
 
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Default 胎儿生长的3个营养关键期

胎儿在妈妈子宫里生存的40周内,也有其自身的成长规律,盟特新产品厂家,摇篮网提醒准妈妈,在孕期要抓住胎儿生长的3个营养关键期哦!
关键期1:孕4-12周
胎儿在妈妈肚子里的前3个月里,是神经管及主要内脏器官发育的关键时期。此时,如果准妈妈的叶酸摄入不足, 就可能引起胎儿神经系统发育异常。因此,要在孕前三个月到怀孕的前三个月补充小剂量叶酸,除此 之外,光波炉厂家,还要多吃富含叶酸丰富的食物,如小白菜、生菜、油菜等蔬菜,还有动物肝肾、豆类、水果、奶制 品等。
关键期2:孕16-24周
胎儿在孕16-24周内是骨骼与大脑迅速发育的关键时期。此时,准妈妈要多食用含钙高的食物促进胎儿骨骼发育,如豆制品、 奶制品、海产品、多叶的绿色蔬菜。除此之外,还要补充富含DHA的营养素。
DHA是脑部发育的必需脂肪酸,是人脑营养必不可少的多不饱和脂肪酸,是构成大脑皮层神经细胞的重要物质, 是视网膜形成的物质基础。可促进大脑发育、提高记忆力。但是,DHA不能在人体自身合成,只能通过外部补充 的方式获得,如富含天然亚油酸、亚麻酸的核桃仁等坚果经摄入后,可经肝脏处理合成 DHA;鱼类和海藻中也都能提取DHA,加湿器价格
关键期3:孕32-37周
此时,胎儿体内需要贮存的营养素增多,代谢活动也有所增强,需要大量的热量和蛋白质。此时,准妈妈可以多增 加一些豆类蛋白质,多吃豆腐和豆浆,光波炉的危害。为了满足大量钙的需要,可以多吃紫菜等海产品。
专家建议:孕妇要根据自身体重的增加来调整食谱,为分娩储存必要的能量。
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