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女性同房后多久能用测试纸测出是否怀孕？

发布日期：2024-06-10 15:48:07编辑：秩名


怀孕多久能用试纸测出来

像专业医疗测试一样,怀孕自测的工作原理是检测HCG值，即人体绒毛膜促性腺激素的值。那么怀孕多久能用试纸测出来？
 
人体绒毛膜促性腺激素是由胎盘制造的，一般在怀孕几天后它就会出现在尿液里，但由于量少，开始不易测验出来，直到10天至14天才日益明显。(通过验血也可测得HCG值,而且要准确得多)。虽然许多种早早孕试纸上都表明女性在错过正 常经期1天之后便可做怀孕自测，但实际上，不是所有怀孕女性排放HCG激素的速度和数量都相同，这是因人而异的。“过早地做尿液测试，所呈现的阴性反应可能是错误的。”妇产科专家如是说。所以，最好在月经期迟来两周后再做怀孕自测，这样结果会可信些。一般药店均有销售。
 

早孕试纸的使用方法

 
1、确定检测时间：月经过期当天即可检测，或在同房后7—10天进行检测。
 
2、检测方法：收集尿液（第一次晨尿为佳），插入试纸条，5分钟内观察结果 。
 
3、检测结果的判断 ： 阳性：试纸条上端和下端均有色带出现，表示怀孕。 阴性：只在试纸条上端出现一条紫红色带而下端无色带出现，表示未怀孕。 无效：无色带出现。说明试纸条已失效。
 

使用试纸的注意事项

 
1、液面不可超过MAX线。
 
2、最好及时检测尿液可在室温放置8小时，冰箱放置24小时，检测时需恢复至室温。
 
3、遵守测试时间，5分钟内读取结果，5分钟后结果无效。
 
4、请在产品有效期内使用。
 

怀孕多久能测出来

现代都市生活十分繁忙，很多孕妈不一定早早就察觉自己怀孕了。那么，在怀孕的各个阶段，具体来说，怀孕多久能测出来呢？准确率又是多少？
 
7天测孕：准确率较小
 
因为我们判定怀孕是通过血HCG和尿HCG的浓度，怀孕后HCG浓度变化有一个过程。即便是用血HCG早孕检查，也需要在受精第9天后才能测准。
 
用血HCG早孕检查，需要在受精第9天后才能测准
 
10天测孕：可通过血检测出
 
一般来说，通过血检，怀孕十天可以测出怀孕。但早孕试纸、验孕棒此时的测试还不太准。
 
20天测孕：可通过验孕纸、验孕棒、尿检测出
 
怀孕20天基本可以测出来了，但是这个时候你想通过B超确认可能还有点早。怀孕20天用B超是看不到的。这个时候，你可以尝试通过验孕纸、验孕棒、血检、尿检等去确诊结果。如果想要B超确认，最佳时间是等45天过后。
 

月经推迟几天算怀孕

除了以上“验孕工具”和“医学检测”两大方法判断是否怀孕之外，你还可以考虑用月经状况来判断。月经推迟是怀孕的征兆之一，那么月经推迟几天算怀孕呢？
 
女性月经周期一般为28～30天。提前或延后7天左右仍属正常范围，周期长短因人而异。但是如果超出7天后还没有来月经，即为月经推迟。月经推迟主要需要考虑两个方面的原因，首先是妊娠，其次是月经不调。想早点确诊是否怀孕，这是因人而异的，早的受孕20天便可验出，晚的要40天才能验出。抽血化验血液中的HCG是验孕较准的方法，但是妈妈也可以先在家用验孕试纸测一下。
 
一般来说，月经推迟7天以上可考虑做早孕测试，来判断是否“幸孕”。但月经停止不一定就是怀孕，造成月经推迟的原因可能是妇科疾病、过度减肥，也可能是精神因素、药物影响等，因此月经规律与否只能作为判断方法，不是确诊方法。说月经推迟就是怀孕了，这种说法是错误的。
 

怀孕初期有哪些表现

一般说来，以下这些症状都是可能是“你怀孕了”的征兆。如果你有8-10种以上的现象，最好去医院确诊一下是否怀孕。
 
1、月经停止∶这是一般人最常注意到的怀孕徵兆，只要是一般正值生育年龄的妇女，月经正常，在性行为后超过正常经期两周，就有可能是怀孕了。但并不是月经没有来就是怀孕了，月经没有来的原因有很多，可能因为卵巢机能不佳，可能因为荷尔蒙分泌不正常，工作忙碌，考试紧张等等，都会引起月经迟来的现象.所以最好还是要经过医师的诊断，才是最安全的。
 
2、乳房有刺痛、膨胀和搔痒感∶乳房有刺痛、膨胀和搔痒感，这是怀孕早期的生理现象，此外，还会有乳晕颜色变深、乳房皮下的静脉明显、乳头明显突出等变化。
 
3、常有恶心、呕吐的感觉∶几乎很多怀孕初期的孕妇都时常会有恶心、呕吐的感觉，尤其是在一天的刚开始。这些症状都是因人而异的，有些人的症状相当轻微，有的则是很严重。除非是恶心、呕吐的非常厉害，才需要就医，否则这些都是怀孕初期的正常现象。
 
4、皮肤颜色有变化∶可能会产生皮肤色素沉淀或是腹壁产生妊娠纹，尤其怀孕后期更为明显。
 
5、阴道黏膜变色∶怀孕初期，阴道黏膜可能会因充血而呈现出较深的颜色，这些由医师做判断。
 
6、容易疲倦∶怀孕初期容易疲倦，常常会想睡觉。
 
7、频尿∶怀孕的第三个月时，因为膀胱受到日益扩大的子宫的压迫，使得膀胱的容量变小，常会有频尿的现象发生。
 

试纸验孕准吗

不少孕妈反应，用早孕试纸来验孕，结果不一定准确。为什么这样呢？试纸验孕准吗？我们一起来看看。
 
早孕试纸测试有误差是因为这些原因：
 
1、尿中带血，或服用一些生育药品，会导致测试结果呈阳性；
 
2、喝水过多使尿液稀释可能会导致假阴性结果。
 
3、在近期有过妊娠的情况下其检测结果不准。因为在终止妊娠后(分娩后、自然流产和人工流产后)的较长一段时间内，HCG可以持续阳性。
 
4、一些疾病和药物可能造成检测结果假阳性。有些肿瘤细胞如葡萄胎、绒癌、支气管癌和肾癌等，也可促进体内分泌HCG。
 
所以，如果自测结果呈阴性，1周之后月经仍未来潮，你应该再做一次自测。如果不是阳性，最好去看医生。

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