What is the standard for fetal biparietal diameter suitable for vaginal delivery?
Fetal biparietal diameter refers to the length of the upper and lower diameter of the fetal head and is one of the indicators for evaluating fetal growth and development. During pregnancy examinations, doctors will measure the fetal biparietal diameter to determine whether the fetal size is normal and whether it is suitable for vaginal delivery. So, what is the standard for fetal biparietal diameter suitable for vaginal delivery? This article will elaborate on four aspects.
1. Measuring method of biparietal diameter
The measurement method of fetal biparietal diameter is relatively simple, usually using ultrasound technology. The doctor will place the ultrasound probe on the pregnant woman\’s abdomen, observe the up and down diameter and length of the fetus\’ head on the screen, and measure it. Under normal circumstances, the biparietal diameter of the fetus will increase as the gestational age increases, and this growth rate is relatively stable. Therefore, by measuring the fetal biparietal diameter, a preliminary judgment can be made on the growth and development of the fetus.
2. Biparietal diameter suitable for normal delivery
The standard for fetal biparietal diameter suitable for vaginal delivery is determined based on gestational age and fetal size. Generally speaking, the greater the gestational age, the greater the fetal biparietal diameter. At the same time, the fetal biparietal diameter is also affected by factors such as the mother\’s height, weight, and body shape. Under normal circumstances, when the biparietal diameter of the fetus reaches about 9.5 cm, it is suitable for vaginal delivery. When the biparietal diameter of the fetus is too large, for example, more than 11 cm, the possibility of cesarean section needs to be considered.
3. How to increase the probability that the fetus’s biparietal diameter is suitable for vaginal delivery?
Improving the probability that the fetus\’s biparietal diameter is suitable for vaginal delivery requires approaches from multiple aspects. First of all, pregnant women should pay attention to their diet and nutritional intake. Malnutrition in pregnant women will affect the growth and development of the fetus, so pregnant women should eat more nutritious foods, such as fruits and vegetables, meat, soy products, etc. Secondly, pregnant women need to maintain adequate rest and sleep. Appropriate exercise can also help increase the chance that the fetus\’s biparietal diameter is suitable for vaginal delivery. Finally, pregnant women should pay attention to avoid being affected by adverse factors such as drugs, injuries and diseases.
4. Risks and treatment methods of fetal biparietal diameter not suitable for vaginal delivery
When the biparietal diameter of the fetus is too large or too small, it may affect the possibility of vaginal delivery. When the fetal biparietal diameter is too large, that is, when it exceeds 11 cm, it may cause dystocia or fetal hypoxia. At this point, your doctor may recommend a cesarean section. When the biparietal diameter of the fetus is too small, it may lead to problems such as poor fetal development and low birth weight. In this case, doctors may use methods such as induction of labor or cesarean section to protect the health of the fetus.
In short, the standard for fetal biparietal diameter suitable for vaginal delivery is determined by gestational age and fetal size. Parents can learn about the growth and development of the fetus through pregnancy examinations, and take appropriate measures to increase the chance that the fetus\’s biparietal diameter is suitable for vaginal delivery. If problems such as the fetal biparietal diameter being too large or too small occur, parents should not be too nervous. They should consult a doctor in time and follow the doctor\’s advice and guidance.
