Is uterus anterior and placenta previa the same?

Anterior uterus and placenta previa are different. These are two terms and also two different symptoms. Anterior uterus is the position of the uterus in the pelvic cavity, while placenta previa is a more serious pregnancy problem that can easily lead to increased bleeding, which is very harmful to the fetus and can easily cause intrauterine fetal death, and it can also cause great harm to pregnant women.

Unprovoked painless vaginal bleeding in late pregnancy is a typical clinical manifestation of placenta previa. The cause of the bleeding is that as the uterus grows, the placenta attached to the lower segment of the uterus and the cervix cannot stretch accordingly, causing dislocation and separation, leading to bleeding. The amount of bleeding for the first time is generally not much, but occasionally there are cases where the amount of bleeding for the first time is heavy. As the lower uterine segment continues to stretch, bleeding often occurs repeatedly and the amount of bleeding increases.

The early or late occurrence of vaginal bleeding, the number of times it recurs, and the amount of bleeding are closely related to the type of placenta previa. Complete placenta previa often has its first bleeding early, around 28 weeks of pregnancy, and repeated bleeding is frequent and heavy. Sometimes a single large amount of bleeding can put the patient into a state of shock.

The first bleeding of marginal placenta previa occurs later, usually between 37 and 40 weeks of pregnancy or after labor, and the amount is also less; the first bleeding time and amount of bleeding of partial placenta previa are between the above two. For patients with partial or marginal placenta previa, rupture of membranes is conducive to the compression of the placenta by the fetal presenting part. If the fetal presenting part can descend rapidly after rupture of membranes, it will directly compress the placenta.

The bleeding can be stopped. Due to repeated or heavy vaginal bleeding, the patient may develop anemia. The degree of anemia is proportional to the amount of bleeding. Severe bleeding may cause shock, fetal hypoxia, or even intrauterine fetal death.

When there is massive bleeding, there may be symptoms of hemorrhagic shock such as anemia, weak but rapid pulse, and decreased blood pressure. Abdominal examination: The size of the uterus is consistent with the month of amenorrhea. Since the placenta covers the internal os of the cervix, it affects the entry of the fetal presenting part into the pelvis, and the fetal presenting part is mostly floating high. A placental vascular bruit may be heard above the pubic symphysis.