推荐回答（2个）
在正是需要服用叶酸的时候，每天坚持服用能有效预防胎儿脑神经管畸形。而且最好可以坚持服用到哺乳期。 除了能预防胎儿脑神经管畸形，还可以预防先心病、兔唇等畸形，另外对早产，胎儿宫内发育迟缓、贫血也有很好的预防效果。哺乳期的服用还能提高母乳质量 不过注意不要误服5毫克的叶酸片，这个是用来治疗巨幼红细胞性贫血的，误服会影响锌的吸收 孕妇专用的是0.4毫克的斯利安叶酸片。
可以吃的，可以吃到怀孕三个月。这是可以的.合理饮食,注意休息.补充叶酸和复合维他命,钙不足的,多喝牛奶,铁和锌也一样重要,不推荐药补,有胃口就尽量食补.保持心情愉快.可多吃水果,多吃蔬菜.补充适当动物植物蛋白.少吃辛辣食品,清淡一些,如豆芽菜,豆腐等.同时多吃点核桃对小孩的脑神经系统发育有好处,豆制品含有丰富的叶酸和B族维生素然蛋白质应是提供热量的主要来源,但饮食必须保持均衡,应包括新鲜水果,蔬菜和含粗纤维,无糖的谷类.最好用含碘盐,但应避免盐份过多的食物或含防腐剂的食物.可以的,服用到怀孕3个月就可以停止了,另外注意,不要偏食.饮食尽可能广泛多样化.多吃高蛋白优质蛋白食物多吃蔬菜水果.不要喝酒咖啡.戒烟.不要接触有毒物质和辐射源.戒烟酒,防止感冒等.忌辛辣食物你好;根据您的提问;建议您在医生的指导下服用斯利安.不要用“叶酸片”代替“小剂量叶酸增补剂”.叶酸增补剂每片中仅含0.4毫克叶酸,是国家批准的惟一预防药品（商品名称为“斯利安”）.而市场上有一种供治疗贫血用的“叶酸片”,每片含叶酸5毫克,相当于“斯利安”片的12.5倍.孕妇在孕早期切忌服用这种大剂量的叶酸片,因为长期大剂量服用叶酸片对孕妇和胎儿会产生不良的影响.祝你健康你好;叶酸对人体的重要营养作用,人类（或其他动物）缺乏叶酸可引起巨红细胞性贫血以及白细胞减少症.叶酸对孕妇尤其重要.如在怀孕头3个月内缺乏叶酸,可导致胎儿神经管发育缺陷,从而增加裂脑儿,无脑儿的发生率.孕妇经常补充叶酸,可防止新生儿体重过轻,早产以及婴儿腭裂（兔唇）等先天性畸形.
叶酸是由喋啶,对氨基苯甲酸和谷氨酸残基组成的一种水溶性B族维生素,亦称为维生素BC或维生素M; 为机体细胞生长和繁殖所必需的物质.帮助蛋白质的代谢.并与维生素B12共同促进红细胞的生成和成熟.是制造红血球不可缺少的物质.在体内叶酸以四氢叶酸的形式起作用,四氢叶酸在体内参与嘌呤核酸和嘧啶核苷酸的合成和转化.在制造核酸（核糖核酸,脱氧核糖核酸）上扮演重要的角色 .人体在利用糖分和氨基酸时的必要物质.
来源网络，仅供参考，望采纳，谢谢。如果您需解决具体问题(尤其法律、医学等领域)，建议您详细咨询相关领域专业人士。
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