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小心远离让胎儿畸形的食物
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孕期给胎儿补充营养是头等大事。但,各位准妈妈看仔细,有些食物不能随便吃!科学家们证实,某些食物具有导致胎儿畸形的作用。这些食物,孕期还是少吃为妙。含有弓形虫的食物几乎所有哺乳动物和禽类(如鼠类、猪、羊 ...


孕期给胎儿补充营养是头等大事。但,各位准妈妈看仔细,有些食物不能随便吃!科学家们证实,某些食物具有导致胎儿畸形的作用。这些食物,孕期还是少吃为妙。

含有弓形虫的食物

几乎所有哺乳动物和禽类(如鼠类、猪、羊、牛、家兔和鸡、鸭、鹅等)都可以传染弓形虫。人类的传染源主要是这些动物的肉类,如火锅的烫涮时间过短、烧烤的温度不够,肉食的弓形虫没有杀死,就有传染的危险;生肉和熟食共用一个切菜砧板,生肉上的弓形虫就会污染熟食;污染的羊、牛奶也可以传染。我国人口的弓形虫感染率较低,可能与中国人熟食肉类的习惯有关,并非跟养宠物有关。

温馨提示:在怀孕早期急性感染弓形虫会导致胎儿脑积水、小头畸形、脑钙化、流产、死胎等,新生儿可有抽搐、脑瘫、试听障碍、智力障碍等,其死亡率达72%。所以孕妈咪一定要避开弓形虫。受污染食物

美国曾在越南战场上大量使用除草剂,致使不少孕妇生下畸形儿,表现为眼脸缺损、额裂、骨化迟缓等。本世纪50年代初期,日本水误市的水域中发生了异常变化:鱼类飘浮在海面上,鸟儿在飞翔中掉到海里,贝类腐烂.海藻枯死。更有甚者,猫儿发疯痉挛,犹如醉酒,步态蹒跚,最后跳河“自杀”。1959年才证明猫是吃了水俣湾的含汞鱼、贝引起的。与此同时,出现了与猫类似的病人,特别是吃了被汞污染的鱼、贝等食物的孕妇,引起胎儿先天性汞中毒,出生后表现为发育不良,智力低下,有的还因脑损伤而致麻痹死亡。

温馨提示:孕妈咪缺乏无机盐或微量元素能致胎儿畸形,孕妇经常食用被污染的食物同样会引起胎儿畸形。被DDT、六六六等有机氯农药及有机汞农药西力生等蓄积性较强的农药污染的食物进入机体,毒物就会在孕妇体内蓄积经血液循环进入胎盘导致胎儿中毒,从而引起流产、畸胎、死胎等。

过多的酸性食物

—般来说,妇女在怀孕初期,常会出现恶心、呕吐等反应,而我国民间历来有用酸性食物来缓解孕期呕吐的做法,甚至有用酸性药物止呕的做法。这些方法是不可取的。

近年来,国外医学界有关研究机构明确指出,酸性食物和药物是导致畸胎的“元凶”之一。

在研究中发现,孕妇过多地食用肉类、鱼类、巧克力、白糖等酸性食物,其体液会发生变化,形成一种“酸化”,进一步促使血中儿茶酚胺水平增高,从而引起孕妇烦躁不安、爱发脾气,易伤感等消极情绪。这种不良的消极情绪,可以使母体内的激素和其他有毒物质分泌增加,则是造成胎儿腭裂、唇裂及其他器官发育畸形的一个重要原因。与此同时,研究人员分别测定了不同时期胎儿组织和母体血液的酸碱度,认为在妊娠的最初半个月左右,不食或少食酸性食物或含酸性的药物(如维生素C、阿司匹林)等为佳。

温馨提示:

从营养学角度出发,孕妇吃些酸味食物,能满足母体与胎儿对营养的需要,孕妇吃些酸味食物,能够帮助胎儿骨骼的生长发育。但是,物极必反,孕妇如食用大量的酸性食品,会使体内碱度下降,容易引起疲乏、无力,不仅容易使母体患某些疾病,更重要的是可因此而影响胎儿正常、健康地生长发育,情况严重者,甚至可导致胎儿畸形。金枪鱼

嗜吃金枪鱼(鲔鱼,tuna)的孕妇要小心!美国环保团体发现连同金枪鱼在内的7种海产,水银的含量严重超标,孕妇经常食用会产下畸胎。有关团体建议美国食品及药物管理局应扩大”水银鱼”的黑名单,有香港医生便指出,胎儿在母体吸收过量水银,会影响脑部神经发育,将来学习能力会有缺陷,以及智力发展迟缓等后遗症。

温馨提示:孕妈妈应减少食用罐头的金枪鱼、鬼头刀、鳕鱼及狭鳕,因为这类罐头鱼的水银含量也很高,食用的分量应以每月一次为限。美国环境工作团体指出,孕妇可安全食用的海产,包括人工饲养的鳟鱼及鲶鱼、虾、左口、太平洋三文鱼、黄鱼、中大西洋蓝蟹及黑丝蟹鱼。

久存的土豆

土豆中含有生物碱,存的越久的土豆生物碱含量越高。过多食用这种土豆,可影响胎儿正常发育,导致胎儿畸形。当然,人的个体差异很大,并非每个人食用后都会出现异常,但孕妇还是不吃为好,特别是不要吃长期贮存的土豆。

温馨提示:如果吃土豆时口中有点发麻的感觉,则表明该土豆中还含有较多的龙葵素,应立即停止食用,以防中毒。

猪肝

芬兰和美国已向孕妇提出了应少吃猪肝的忠告。因为在给牲畜迅速催肥的现代饲料中,添加了过多的催肥剂,其中维生素A含量很高,致使它在动物肝脏中大量蓄积。孕妇过食猪肝,大量的维生素A便会很容易进入体内,对胎儿发育危害很大,甚至会致畸。

温馨提示:维生素A超量几乎对身体各个部分都会造成损害,包括眼睛、骨骼、血液、皮肤、中枢神经系统、肝脏、生殖和泌尿系统,可出现头昏、呕吐、头痛、皮肤受损、智力障碍和月经失调的现象,严重的甚至会失明和有生命危险

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