Determining The Gestational Age Of A Fetus Essay
Determining the gestational age of a fetus is very important for the well being of the fetus throughout the pregnancy. A gestational age tells the doctor how developed the fetus is at specific weeks during prenatal doctor visits. With a pregnancy wheel, doctors use the tool to determine the woman’s due date, fetus’s approximate weight, appropriate testing, and more.
What is a pregnancy wheel?
According to Naegele’s rule, a typical pregnancy is 280 days long, or 40 weeks, so a device was in need to help clinicians know what was happening to the pregnant woman and developing fetus week to week. The pregnancy wheel is a device that has helped the OBGYN doctor in a variety of ways. The wheel has exact dates that are important to the development of the fetus. It also provides timelines of important testing, and even how big the fetus may be at that week.
When and why was it invented?
Naegele 's rule is a way to calculate a due date for a pregnancy that was developed as far back as the 19th century (Baskett and Nagele, 2000). Pregnancy wheels are based off the Naegele 's rule. According to the The Journal of Maternal-Fetal & Neonatal Medicine, some wheels can be inaccurate, up to five days. Without the pregnancy wheel though, the doctor is expected to estimate the expected date of delivery (EDD) by adding one year, subtracting three months, and adding seven days to the first day of a woman 's last menstrual period (LMP) (MacKenzie, Stephenson, and Funai, 2015)…