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Foetal Age vs. Gestational Age


Monitoring the development of the fetus is a critical task for obstetricians worldwide. As a result, the obstetric community has created a set of metrics and values to assess and compare growth. For example, gestational and fetal age are two essential values influencing pregnancy decisions. What is the perfect way to find the age calculator?

The gestational age of a pregnancy is calculated from the last menstrual period. As a result, this period includes the time between the last menstrual period and the day of ovulation/fertilization. In women with regular 28-day cycles, this period may range from 11 to 20 days.

This period can vary from the above values in women with longer or shorter cycles than the ntypical28-day cycle. In women with irregular cycles, calculating gestational age is difficult.

All fetal growth and development observations are compared to the gestational age baseline. It also serves as the foundation for calculating the expected delivery date. The EDD is calculated using the formula below.

EDD=LMP+ It’s been nine months and seven days.

The calculated EDD is used to guide decisions throughout pregnancy, particularly those regarding termination of pregnancy due to fetal or maternal causes.

Fetal age, on the other hand, is the actual age of the fetus. As a result, this value will be 11-20 days lower than the gestational age. Except in cases where LMP is unknown, all references to pregnancy in obstetrics are usually in gestational age rather than fetal age.

This is common when a woman becomes pregnant immediately after giving birth. Ovulation is suppressed for 3-6 months after delivery due to the action of prolactin produced by breastfeeding. As a result, women typically experience amenorrhea for 3-6 months after giving birth. However, the onset of ovulation is highly unpredictable, and many women may become pregnant during this time.

Because there is no LMP to calculate gestational age, pregnancy decisions must be made based on fetal age. Therefore, ultrasound is used to estimate the fetal period. During the scan, measurements of fetal age can be made using the head circumference, crown-rump height, femur length, and abdominal circumference. As the pregnancy progresses, the accuracy of ultrasound in determining fetal age improves.

To summarize, gestational age is the standard reference in obstetrics and is calculated from the date of LMP. The fetal age is the actual age of the fetus, which is 11-20 days younger than the gestational age. When calculating the gestational age is complex, the fetal age can be used as a substitute.

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