Máy Tính Ngày Dự Sinh

{"@context":“https://schema.org”,"@type":“FAQPage”,“mainEntity”:[{"@type":“Question”,“name”:“How accurate is a due date calculator?”,“acceptedAnswer”:{"@type":“Answer”,“text”:“LMP-based calculations are accurate to within ±2 weeks for most women with regular 28-day cycles. An early ultrasound (before 12 weeks) can refine the estimate to within ±5–7 days, as fetal size in early pregnancy is highly predictable. Only 4–5% of babies are born on their exact due date.”}},{"@type":“Question”,“name”:“What if my cycle is not 28 days?”,“acceptedAnswer”:{"@type":“Answer”,“text”:“For cycles longer than 28 days, your due date shifts later by the number of extra days in your cycle (e.g., a 35-day cycle pushes due date ~7 days later). For shorter cycles (e.g., 21 days), the due date moves ~7 days earlier. A first-trimester ultrasound is the most reliable way to establish accurate dating if your cycles are irregular.”}},{"@type":“Question”,“name”:“Can the due date change during pregnancy?”,“acceptedAnswer”:{"@type":“Answer”,“text”:“Yes. Your provider may revise your due date based on ultrasound measurements if they differ significantly from LMP dating. In general, if the ultrasound is within 7 days (first trimester) or 10–14 days (second trimester) of the LMP date, most providers keep the original due date. If the discrepancy is larger, they’ll typically use the ultrasound date.”}},{"@type":“Question”,“name”:“What is the difference between gestational age and fetal age?”,“acceptedAnswer”:{"@type":“Answer”,“text”:“Gestational age is counted from the first day of your last menstrual period — so at the moment of conception you’re already about 2 weeks "pregnant" by this measure. Fetal age (sometimes called embryonic age or conceptional age) is counted from actual fertilization, and is typically 2 weeks less than gestational age.”}},{"@type":“Question”,“name”:“When does morning sickness usually end?”,“acceptedAnswer”:{"@type":“Answer”,“text”:“For most women, morning sickness peaks between weeks 8–10 and resolves by week 12–14 (end of first trimester). About 25% of women experience it beyond the first trimester. Hyperemesis gravidarum (severe nausea and vomiting causing dehydration and weight loss) affects 0.5–2% of pregnancies and requires medical treatment.”}},{"@type":“Question”,“name”:“Is it safe to exercise during pregnancy?”,“acceptedAnswer”:{"@type":“Answer”,“text”:“For most healthy pregnancies, 150 minutes of moderate-intensity exercise per week is recommended by ACOG (American College of Obstetricians and Gynecologists). Walking, swimming, prenatal yoga, and moderate strength training are all generally safe. Avoid contact sports, activities with fall risk, and exercises lying flat on your back after the first trimester. Always get clearance from your healthcare provider.”}},{"@type":“Question”,“name”:“What are signs of labor starting?”,“acceptedAnswer”:{"@type":“Answer”,“text”:“Early signs include: bloody show (mucus plug discharge), regular contractions that increase in frequency and intensity, and water breaking (rupture of membranes). Braxton Hicks contractions are irregular practice contractions and are normal from mid-pregnancy onward. Contact your healthcare provider when contractions are 5 minutes apart, lasting 1 minute, for at least 1 hour (the 5-1-1 rule), or immediately if your water breaks.”}},{"@type":“Question”,“name”:“How is a due date calculated for twins?”,“acceptedAnswer”:{"@type":“Answer”,“text”:“Twin (and higher-order multiple) pregnancies use the same LMP calculation. However, twins are typically delivered earlier than singletons. Dichorionic-diamniotic (DCDA) twins are usually delivered at 38 weeks; monochorionic-diamniotic (MCDA) at 36–37 weeks; monochorionic-monoamniotic (MCMA) twins as early as 32–34 weeks due to cord entanglement risk.”}}]}