Dating conception 100 azdg libarain dating

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Measuring the baby using ultrasound is most accurate in early pregnancy. The best time to estimate gestational age using ultrasound is between the 8th and 18th weeks of pregnancy.

Except for in-vitro fertilization (IVF) and other assisted reproductive procedures, you cannot precisely calculate the exact day a sperm meets an egg and fertilization (conception) occurs.However, you can use various factors and knowledge about reproduction to help narrow down the date to within one to five days if your cycles are regular.The accuracy of estimating your date of conception depends on several factors about your menstrual cycle and ovulation, as well as facts about the egg and the sperm.Gestational age, or the age of the baby, is calculated from the first day of the mother’s last menstrual period.Since the exact date of conception is almost never known, the first day of the last menstrual period is used to measure how old the baby is.

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