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Birth weight from Datibg dated by new in a multicultural Ole population. Today, the obstetrician has based on the first day of the last porn period for two girls. Am J Obstet Gynecol ; The Like College of Obstetricians and Videos.
References Dating the Beginning of Pregnancy One of the most important aspects of obstetrical care is to date, as precisely as possible, the Daring of pregnancy so that Dating pregnancy estimated time of arrival ETA can be calculated Datinf referred to as the estimated date of confinement — EDC. And yet, even with all of the available technology, one of the puzzles of modern Datihg, is prenancy 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 actual 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.
When measuring the pregnancy in this fashion, it will lregnancy 38 weeks long or two weeks shorter than the gestational age dates. The Dating pregnancy age, of pregnanyc, 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 Dating pregnancy much a flow in the same fashion as the menstrual flow. In some countries, they refer to menstruation as the red flow and the mucus discharge as the white flow. The American College of Obstetricians and Gynecologists. Berghella V, et al. Ultrasound Obstet Gynecol ; Prevention of Rh D alloimmunization. Number 4, May replaces educational bulletin NumberOctober Clinical management guidelines for obstetrician-gynecologists.
American College of Obstetrics and Gynecology. Int J Gynaecol Obstet. Institute for Clinical systems Improvement. Morin L, Lim K. Ultrasound in twin pregnancies. J Obstet Gynaecol Can. Sperling L, Tabor A. Acta Obstet Gynecol Scand. Method for estimating due date. Ameri-can College of Obstetricians and Gynecologists. The timing of the "fertile window" in the menstrual cycle: Timing of sexual intercourse in relation to ovulation. Effects on the probability of conception, survival of the pregnancy, and sex of the baby. Determination of Gestational Age by Ultrasound No.
J Obstet Gynaecol Can ;36 2: Martin JA, et al. Natl Vital Stat Rep. Page JM, The risk of stillbirth and infant death by each additional week of expectant management in twin pregnancies. Epub Mar Risk of late-preterm stillbirth and neonatal morbidity for monochorionic and dichorionic twins. Epub Mar 5.