孕周 13
孕期: 1
此阶段的常见情况，附您所在地区的常见里程碑。
- First trimesterWeeks 1 to 13. Early development and the first scans. Many people feel tired or queasy in these weeks.
- Dating scanAn early ultrasound that confirms how far along the pregnancy is. This is the most accurate way to date a pregnancy.