Ten months of pregnancy is a happy and arduous process for pregnant women, and they have to endure various pregnancy reactions. However, when choosing how to give birth to their babies, bold mothers choose to have a natural birth. Of course, with the development of technology, cesarean section is also very common in today's society, so pregnant women can choose to have a baby. So, is a 9.5 biparietal diameter natural birth okay?
Is a double top diameter of 9.5 suitable for vaginal delivery
The biparietal diameter of the fetal head refers to the length of the widest part between the left and right sides of the fetal head, also known as the "transverse diameter of the head". The maximum biparietal diameter of 10 centimeters cannot be delivered naturally. Double apical diameter vaginal delivery depends on whether your pelvic outlet meridian is large enough. Generally speaking, as long as the double apical diameter does not exceed 95, the probability of vaginal delivery is relatively high. But it is not an absolute factor, it depends on whether the bone and soft birth canal of the pregnant woman are large enough to allow the fetal head to pass through the birth canal.
Doctors often use the biparietal diameter to observe a child's development and determine if there is a mismatch between the head and pelvis for a smooth delivery. Using biparietal diameter to determine a child's developmental size is a reference data. The maximum diameter line for the fetal head to pass through the birth canal during delivery is the biparietal diameter, while the minimum diameter line for the fetal head to pass through the birth canal is the transverse diameter of the pelvic outlet. Therefore, if the biparietal diameter is greater than the transverse diameter of the pelvic outlet, whether the child can give birth naturally is a question. The final choice also depends on the pregnant woman's pelvis and the size of the full-term baby.
Fetal biparietal diameter standard at the interval of one week during pregnancy
12 week fetal biparietal diameter standard: When the fetus grows to 4.58 centimeters, the external genitalia are initially developing, and any abnormalities can be manifested. The head calcification is more complete. The skull halo is clear, the biparietal diameter can be measured, and obvious deformities can be diagnosed. Afterwards, various organs tend to improve.
13 week fetal biparietal diameter standard: The average biparietal diameter is 2.52 ± 0.25
14 week fetal biparietal diameter standard: The average biparietal diameter is 2.83 ± 0.57
15 week fetal biparietal diameter standard: The average biparietal diameter is 3.23 ± 0.51
16 week fetal biparietal diameter standard: The average biparietal diameter is 3.62 ± 0.58
17 week fetal biparietal diameter standard: The average biparietal diameter is 3.97 ± 0.44
18 week fetal biparietal diameter standard: The average biparietal diameter is 4.25 ± 0.53
19 week fetal biparietal diameter standard: The average biparietal diameter is 4.52 ± 0.53
20 week fetal biparietal diameter standard: The average biparietal diameter is 4.88 ± 0.58
21 week fetal biparietal diameter standard: The average biparietal diameter is 5.22 ± 0.42
22 week fetal biparietal diameter standard: The average biparietal diameter is 5.45 ± 0.57
23 week fetal biparietal diameter standard: The average biparietal diameter is 5.80 ± 0.44
24 week fetal biparietal diameter standard: The average biparietal diameter is 6.05 ± 0.50
25 week fetal biparietal diameter standard: The average biparietal diameter is 6.39 ± 0.70
26 week fetal biparietal diameter standard: The average biparietal diameter is 6.68 ± 0.61
27 week fetal biparietal diameter standard: The average biparietal diameter is 6.98 ± 0.57
28 week fetal biparietal diameter standard: The average biparietal diameter is 7.24 ± 0.65
29 week fetal biparietal diameter standard: The average biparietal diameter is 7.50 ± 0.65
30 week fetal biparietal diameter standard: The average biparietal diameter is 7.83 ± 0.62
31 week fetal biparietal diameter standard: The average biparietal diameter is 8.06 ± 0.60
32 week fetal biparietal diameter standard: The average biparietal diameter is 8.17 ± 0.65
33 week fetal biparietal diameter standard: The average biparietal diameter is 8.50 ± 0.47
34 week fetal biparietal diameter standard: The average biparietal diameter is 8.61 ± 0.63
35 week fetal biparietal diameter standard: The average biparietal diameter is 8.70 ± 0.55
36 week fetal biparietal diameter standard: The average biparietal diameter is 8.81 ± 0.57
37 week fetal biparietal diameter standard: The average biparietal diameter is 9.00 ± 0.63
38 week fetal biparietal diameter standard: The average biparietal diameter is 9.08 ± 0.59
39 week fetal biparietal diameter standard: The average biparietal diameter is 9.21 ± 0.59
40 week fetal biparietal diameter standard: The average biparietal diameter is 9.28 ± 0.50
The above is an introduction to under what circumstances vaginal delivery is possible. In special circumstances, vaginal delivery is not possible as it may cause harm to the fetus or adult's body. Therefore, friends who insist on vaginal delivery should listen to the doctor's advice, see if their body can undergo vaginal delivery, and then check if the fetus in their belly can accept vaginal delivery. After understanding everything, make a decision.
