How to Use 使用说明

1. 1. Enter the first day of your last menstrual period
2. 1. 输入您最后一次月经的第一天
3. 2. Click "Calculate Due Date"
4. 2. 点击"计算预产期"
5. 3. See your estimated due date and pregnancy timeline
6. 3. 查看您的预产期和孕期时间线

About Pregnancy 关于怀孕

• Due Date: Estimated using Naegele's rule (LMP + 280 days)
• 预产期: 使用内格莱规则计算（末次月经 + 280天）
• Trimesters: Pregnancy is divided into three 13-week periods
• 孕期: 怀孕分为三个13周的阶段
• Full Term: Between 39 weeks and 40 weeks 6 days
• 足月: 39周至40周6天之间

Pregnancy Tips 怀孕建议

• ▸ Only about 5% of babies are born on their exact due date
• ▸ 只有约5%的婴儿在预产期当天出生
• ▸ Most babies arrive within 2 weeks before or after the due date
• ▸ 大多数婴儿在预产期前后2周内出生
• ▸ Schedule regular prenatal checkups with your doctor
• ▸ 定期进行产前检查
• ▸ Consider taking prenatal vitamins
• ▸ 考虑服用产前维生素