孕周计算器 / 预产期计算

使用孕周与预产期计算器快速计算,并了解结果代表什么。

即时结果 在浏览器中运行

How is the due date calculated?

Naegele's Rule: Add 280 days (40 weeks) to the first day of your last menstrual period. Most pregnancies are born between 38 and 42 weeks. This estimate may vary — always consult your doctor.

Trimesters

PeriodWeeks
1st Trimester1 – 13
2nd Trimester14 – 27
3rd Trimester28 – 40

如何使用?

  1. 1
    输入末次月经嗥期 Select the first day of your last menstrual period from the date picker.
  2. 2
    点击计算 Your due date, current week, trimester and days remaining are instantly shown.
  3. 3
    追踪孕期进程 Use the result as a guide. Your doctor may adjust the date based on ultrasound measurements.

常见问题

What is Naegele's Rule?
Naegele's Rule estimates the due date by adding 280 days (40 weeks) to the first day of the last menstrual period. It was developed by German obstetrician Franz Karl Naegele and is still the most widely used method.
How accurate is the due date calculation?
Only about 5% of babies are born exactly on the predicted due date. About 80% are born within 2 weeks before or after. An ultrasound scan in the first trimester provides a more precise estimate.
What are the three trimesters?
The 1st trimester is weeks 1–13, the 2nd trimester is weeks 14–27, and the 3rd trimester is weeks 28–40. Each stage brings different development milestones and check-up schedules.

孕周与预产期计算器怎么用

孕周与预产期计算器适合快速查看健康相关的估算结果。中文用户常搜索“怎么算”“在线计算”“每日需要多少”“怀孕几周”等问题,所以页面不仅给出数字,也说明输入项、计算逻辑和结果的限制。

结果如何理解

BMI、基础代谢、饮水量、热量、标准体重和孕周都存在个体差异。年龄、性别、活动量、疾病、用药、孕期情况都会影响判断。

重要提醒

孕周与预产期计算器提供的是一般信息和估算结果,不能替代医生诊断。若结果异常,或涉及怀孕、慢性病、明显症状,请咨询医生或专业人士。

符合搜索意图的阅读方式

很多人搜索健康计算器时想要直接答案,但健康数字不能脱离背景理解。请同时查看结果范围、输入条件、个人差异和注意事项,这样才更适合日常记录或就诊前准备。

提高准确性的建议

请正确输入身高、体重、活动量和日期,不要混用单位。饮水量、热量和孕周等结果都可能因个人情况不同而变化。

孕周与预产期计算器常见问题

可以免费使用吗?可以,打开浏览器即可使用。结果是最终答案吗?不是,结果取决于输入值和计算假设。为什么和其他网站不同?可能因为单位、取整方式、公式或地区规则不同。

更实用的使用方法

建议先用基础数据计算,再一次只修改一个输入项,观察结果如何变化。这样可以理解哪些因素影响最大。若孕周与预产期计算器用于重要事项,请同时记录输入值和结果,方便之后核对。

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