How does ultrasound determine gestational age?

Oct 13, 2022 Source: Cainiu Health

Dr. Lv Aiming

Introduction

The gestational age is usually estimated using ultrasound by measuring the size of the embryo and gestational sac. During pregnancy, the embryo and gestational sac gradually increase in size over time. Ultrasound primarily uses sound waves to generate images of the embryo and gestational sac. Doctors can determine the gestational age by observing the size of the gestational sac and the length of the embryo, thereby estimating the approximate delivery date and ensuring the baby is born safely.

Under normal circumstances, gestational age is usually estimated using B-ultrasound based on the size of the embryo and gestational sac.

During pregnancy, the embryo and gestational sac gradually increase in size over time. B-ultrasound primarily uses sound waves to generate images of the embryo and gestational sac, allowing for direct visualization. Professional doctors can determine the gestational age by observing the size of the gestational sac and the length of the embryo, thereby estimating the approximate delivery date. This helps pregnant women prepare in advance for childbirth and ensures the baby is delivered safely.

It is recommended to undergo B-ultrasound examinations at正规 hospitals to avoid significant errors that could affect the accuracy of the due date estimation. Additionally, pregnant women should take care to protect themselves, avoiding pressure or abdominal impacts to prevent miscarriage. It is also important to avoid consuming raw or cold foods such as ice cream, crab, and grapefruit, which may negatively affect health. Smoking and alcohol consumption must be avoided to prevent fetal abnormalities.

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