Is a 46mm Biparietal Diameter Normal at 20 Weeks of Pregnancy?

A biparietal diameter (BPD) of 46mm at 20 weeks of pregnancy falls within the normal range. It is advisable to strengthen nutrition intake, maintain a reasonable schedule, and undergo regular prenatal check-ups. The standard BPD for a fetus at 20 weeks of pregnancy is 4.88±0.58cm, so a measured BPD of 46mm is within the normal range, as there are individual differences in fetal development.

Generally, a larger BPD may indicate overgrown fetal development or excessive nutrition intake by the pregnant woman. However, it could also be caused by cerebral edema, which can usually be detected through a B-scan ultrasound. A significantly smaller BPD may indicate developmental retardation or potentially severe intellectual issues.

At 20 weeks of pregnancy, it is important to maintain a good mental state and sufficient sleep. The diet should be as diverse as possible, with a focus on nutritious foods such as meat, fish, eggs, milk, and bean products, to obtain comprehensive nutrition from various foods and provide adequate nutrients for fetal development. Additionally, regular prenatal check-ups should be conducted to monitor fetal development. After 20 weeks, it is important to pay attention to fetal movement, and if any abnormalities are detected, it is recommended to seek medical attention promptly.