预产期计算器
结果仅供估算，重大医疗决定请咨询专业人员。
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2% – 55% reference display (not a diagnosis)
结果仅供估算，重大医疗决定请咨询专业人员。
常见问题
常见问题 — 预产期计算器
The calculator gives an estimate based on your entries; read the notes below and seek professional guidance when necessary.
Is this medical advice?
No. This calculator offers an estimate, not a medical diagnosis or treatment plan.
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By convention, estimated delivery occurs 40 weeks after the first day of a last menstrual period for a 28-day cycle. When a conception date is known, an approximate 266-day calculation is often used. Fertility treatments require specific clinical dating methods, so this calculator is not designed for IVF embryo-transfer dates. The clinical due date should be set with a qualified prenatal care professional.
结果仅供估算，重大医疗决定请咨询专业人员。