Normal range of SD value at 24 weeks of pregnancy

Many pregnant women want to understand their fetus's development and confirm whether certain indicators fall within the normal range. So, what is the normal range for the SD value at 24 weeks of pregnancy?

Normal SD Value Range at 24 Weeks of Pregnancy

At 24 weeks, the average SD ratio is around 3.5, with an upper limit of 4.25. Generally, the SD ratio at 24 weeks may be relatively high, but as long as it remains below 4.25, it is considered acceptable. If the value exceeds 4.25, there may be an increasing trend in fetal blood flow resistance, indicating possible fetal hypoxia in the uterus, which could suggest intrauterine oxygen deficiency or even severe outcomes such as stillbirth. Additionally, the SD ratio can fluctuate significantly and may change momentarily. If a temporary increase occurs, pregnant women should rest adequately and undergo another ultrasound examination after 2–3 days.

At 24 weeks of pregnancy, women should attend their fourth prenatal checkup and undergo screening for gestational diabetes. They should not eat or drink before the screening test. During this period, it's important to moderately control food intake and manage weight gain. Maintain a light diet, avoiding sweets, overly salty, or spicy foods, and engage in moderate exercise to strengthen physical health. Pay attention to calcium and iron supplementation to meet the fetus’s nutritional needs. Avoid taking unapproved supplements, abstain from smoking and alcohol, practice胎教 (fetal education), and maintain a positive mood, all of which support healthy fetal development.

During pregnancy, it is recommended to avoid stimulants, strong-flavored, and spicy foods, and instead consume more fresh fruits and vegetables. Maintain a regular work and rest schedule, avoid excessive fatigue, stay calm and focused on nurturing the pregnancy, and attend prenatal checkups on time. We hope this information has been helpful. Wishing you good health and happiness!