🌱 着床日期计算器Implantation Calculator
根据排卵日或末次月经第一天和周期长度，估算受精卵着床的日期范围（排卵后 6–12 天，最常见 8–10 天），以及最早可以验孕和建议验孕的日期。Estimate when implantation may happen — 6 to 12 days after ovulation, most often days 8–10 — from the ovulation date or the first day of the last period and cycle length, with the earliest and recommended pregnancy test dates.
使用说明与常见问题How-to & FAQ
「着床日期计算器」是什么？What is the Implantation Calculator tool?
根据排卵日或末次月经第一天和周期长度，估算受精卵着床的日期范围（排卵后 6–12 天，最常见 8–10 天），以及最早可以验孕和建议验孕的日期。Estimate when implantation may happen — 6 to 12 days after ovulation, most often days 8–10 — from the ovulation date or the first day of the last period and cycle length, with the earliest and recommended pregnancy test dates.
如何使用「着床日期计算器」？How do I use the Implantation Calculator tool?
在「着床日期计算器」中，填写「依据」、「日期」、「月经周期（天）」等参数，结果会随输入实时计算并显示在下方。In the Implantation Calculator: Fill in "Based on", "Date", "Cycle length (days)"; results are recalculated instantly as you type.
着床一般在什么时候？When does implantation happen?
一项 221 名女性的研究（Wilcox 等，《新英格兰医学杂志》1999）发现，着床发生在排卵后 6–12 天，84% 在第 8–10 天。A study of 221 women (Wilcox et al., NEJM 1999) found implantation 6–12 days after ovulation, 84% of the time on days 8–10.
什么时候验孕最准？When is a test most reliable?
着床后才开始产生 hCG，通常需要 2–3 天才能被验孕试纸测出。因此“最早可能测出”的日期 = 最常见着床日（排卵后 8–10 天）再加 2–3 天，即排卵后约 10–13 天，这只是部分人能测出的最早时间。月经推迟当天或之后测试最准确；太早测试可能出现假阴性。hCG is made only after implantation and usually takes 2–3 days to reach detectable levels, so the 'earliest possible positive' is the most likely implantation days (8–10 days after ovulation) plus 2–3 days — about 10–13 days after ovulation, and only some people test positive that early. Testing on or after the day your period is due is most reliable; earlier tests can give false negatives.
着床出血是什么？What is implantation bleeding?
少数人在着床时会有少量点状出血，颜色较浅、持续 1–2 天，常被误认为月经。如有大量出血或腹痛请就医。Some people notice light spotting around implantation, usually pale and lasting a day or two, which can be mistaken for a period. Seek care for heavy bleeding or pain.
结果可以代替医生的建议吗？Can this replace medical advice?
不能。「着床日期计算器」基于常用公式给出估算，个体差异较大，如有健康问题请咨询医生或专业人士。No. The Implantation Calculator gives estimates from common formulas; individuals differ, so consult a doctor or professional for health decisions.
「着床日期计算器」免费吗？需要注册吗？Is the Implantation Calculator free? Do I need an account?
「着床日期计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Implantation Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.