If the ultrasound date is within seven days of your LMP date, we would stick with your LMP date.
Ultrasounds done later in the pregnancy are less accurate for dating, so if your due date is set in the first trimester, it shouldn't be changed.
Naegele was born July 12, 1778, in Düsseldorf, Germany.
In 1806, Naegele became ordinary professor and director of the lying-in hospital in Heidelberg.
His Lehrbuch der Geburtshilfe, published in 1830 for midwives, enjoyed a successful 14 editions.
The rule estimates the expected date of delivery (EDD) (also called EDC, for estimated date of confinement) from the first day of the woman's last menstrual period (LMP) by adding one year, subtracting three months, and adding seven days to that date.
The articles assist in the understanding of the anatomy involved in treating specific conditions and performing procedures.
They can also facilitate physician-patient discussions. Drug Monographs More than 7100 monographs are provided for prescription and over-the-counter drugs, as well as for corresponding brand-name drugs, herbals, and supplements. Drug Interaction Checker Our Drug Interaction Checker provides rapid access to tens of thousands of interactions between brand and generic drugs, over-the-counter drugs, and supplements.
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Determining the Date of Conception Because the human egg is capable of fertilization for only 12 to 24 hours after ovulation the date of ovulation may be taken as being the date of conception.
However, ultrasound determination of the date of ovulation has the same imprecision as does the ultrasound estimate of the gestational age and, therefore, a precise date of conception cannot usually be determined as with in vitro fertilization.