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Dating ivf pregnancies

Dating ivf pregnancies

IVF Calculator: Estimating Your Due Date, Your Fertility Friend

References Dating the Beginning of Pregnancy One of the most important aspects of obstetrical care is to date, as precisely as possible, the beginning of pregnancy so that the estimated time of arrival ETA can be calculated sometimes referred to as the estimated date of confinement — EDC. And yet, even with all of the available technology, one of the puzzles of modern obstetrics, is that the obstetrician has not yet learned how to accurately date the beginning of a pregnancy.

Pregnancy can be measured in two different ways.

The most common and most often used in clinical obstetrics is the measurement of the gestational age of the pregnancy. The gestational age of the pregnancy is measured from the first day of the last menstrual period.

In this way of dating the pregnancy, the pregnancy is 40 weeks in duration on average instead of the dating ivf pregnancies 38 weeks. In other words, it dates the pregnancy, on average, two weeks longer than it is. The other way of measuring the dates of the pregnancy is to measure the fetal age.

The fetal age of the pregnancy is measured from the time of conception or the estimated time of conception ETC.

Due date calculation for IVF pregnancies. In vitro fertilization (IVF) is the only case in which your doctor will know exactly when you conceived. The due date can. Try our fantastic IVF due date calculator! Work out your baby's due date after IVF, donor eggs and FETs. It even tells you how many days pregnant you are!. Calculate delivery due date, gestational age and other important dates during pregnancy using LMP, ultrasound dating, or date of conception (IVF). diameter (BPD) in pregnancies conceived in an IVF setting. Design Included were INTRODUCTION. Accurate dating of the pregnancy is the basis for optimal.

When measuring the pregnancy in this fashion, it will be 38 weeks long or two weeks shorter than the gestational age datings ivf pregnancies. The fetal age, of course, is the actual age of the pregnancy. Historically, the obstetrician has focused on the first day of the last menstrual period for two reasons.

First of all, the menstrual flow itself is a fairly dramatic symptom which the woman can be expected to remember.

In addition, it is easy to teach her to record the first day of the last menstrual period so that when that information is elicited by the physician, at a later time, it is available. However, in the midst of all of this, the obstetrician and many women have missed the point that the cervical mucus discharge is very much a flow in the same fashion as the menstrual flow.

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In some countries, they refer to menstruation as the red flow and the mucus discharge as the white flow. Unfortunately, modern obstetrics has paid little attention to the white flow. Therefore, one can date the pregnancy according to its true date or true beginning or in fetal age terms.

This is measured by evaluating the acts of intercourse that occur during the time of fertility and establishing an estimated time of conception through this approach. We have studied patients in a consecutive fashion who have been charting the CrMS at the time of conception. In this group of patients, early ultrasound dating of the pregnancy was also obtained.

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In Tablethe results of that evaluation are shown. An accurate date for the beginning of pregnancy can be established with the use of the CrMS.

This correlates well with the ultrasound dates and the estimated due date or ETA. The CrMS dates were highly accurate with the two being within 10 days of each other in percent of the cases.

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An example of this dating is shown in Figure Here, a pregnancy occurring in a longer cycle where the Peak Day occurred on Day 26 of the cycle is shown. If this pregnancy is calculated in the traditional fashion, there will be a day discrepancy between the dates as customarily calculated from the last menstrual period and the actual date of the pregnancy which is calculated from the Peak Day.

The Peak Day, of course, will be much more accurate.

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