What is the reason of low placenta previa?

summary

If the pregnant mother is found to be placenta previa after pregnancy, it can be called high-risk pregnancy, so such pregnant mothers will be very worried, so what is placenta previa? Why do pregnant mothers worry? Let's get to know the relevant knowledge one by one.

What is the reason of low placenta previa?

Under normal circumstances, the placenta should be attached to the inner posterior wall of the mother's uterus, or the anterior wall or the lateral wall, but what placenta is attached to the lower part of the mother's uterus or covered in the position of the cervical orifice, which is lower than the exposed part of the fetus, this situation is placenta previa.

Generally, the cause of placenta previa is due to the damage of the female endometrium, especially the women who have undergone uterine fibroid surgery, artificial abortion or caesarean section during the birth of the previous fetus. The endometrium and grass-roots units have been damaged, resulting in poor local blood supply after pregnancy, but the fetus will consciously increase the area to get more nutrition, thus covering the cervix, Placenta previa is formed.

Placenta previa is easy to cause massive hemorrhage in pregnant women, pregnant women with the second child, especially the first child is cesarean section, we must pay attention to the prenatal examination, clear whether they have placenta previa. Because after pregnancy, the growth rate of placenta will slow down, but the growth rate of uterus will speed up, the relative position of placenta and cervical orifice will change, and it is easy to have placenta and cervical dissection, which is the cause of massive hemorrhage in pregnant women with placenta previa.

matters needing attention

Marginal placenta previa can choose vaginal delivery, but only in labor, vaginal bleeding is not much, the general condition is good, the progress of labor is smooth, it is estimated that the delivery can be completed in a short period of time to take this way, once the progress of labor is not smooth, vaginal bleeding is large, it must be immediately changed to cesarean section.