孕期计算器
输入您的末次月经日期以计算预产期并查看当前孕周。
Due Date
Days Remaining
Current Week
Trimester
孕期计算器的常见用途
预产期规划
Plan maternity leave, baby showers, and nursery prep around your due date.
周数跟踪
Know exactly how far along you are at any point during pregnancy.
里程碑追踪
See when important prenatal checkpoints occur.
常见问题
How is the due date calculated?
The estimated due date is calculated using Naegele's rule: add 280 days (40 weeks) to the first day of your last menstrual period.
How accurate is this?
This provides an estimate. Only about 5% of babies arrive on their exact due date. Your doctor may adjust based on ultrasound.
What trimester am I in?
First trimester: weeks 1-12, Second: weeks 13-27, Third: weeks 28-40.