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A 37-year-old member asked:

why is there bleeding with placenta previa?

3 doctor answers3 doctors weighed in
Dr. Nasiruddin Mansury
Neonatology 17 years experience
Placenta: When placenta is on lower uterine segment, it is called placenta previa. When plans is completely covering the internal os it is complete placenta previa. When the lower segment of uterus gets stretched in last trimester, it distrupts the placenta to cause bleeding.
Dr. Nikolaos Zacharias
Maternal-Fetal Medicine 26 years experience
Maternal vessels.: Placenta previa means that the internal cervical os is covered by trophoblast. When labor occurs, or the amniotic membranes rupture, the placenta starts detaching from the lower uterus, so the maternal blood circulating through the placenta exits from its proper place and manifests as vaginal bleeding (not fetal blood).
Dr. Brian Nguyen
Obstetrics and Gynecology 11 years experience
Leaky vessels: Previa: Placenta overlies the cervix/birth canal. Gr 1 means placenta is close, Gr 4 means it's directly overlying/blocking the baby's exit -- high chance of preterm labor & bleeding; you'd need a C/S at 36-37wks. More common in woman w/ hx of C/S & smoking. Not much you can do but wait. If dx'ed early, the uterus still grows/stretches and a placenta can migrate away even in 3rd tri. Follow w/ US.

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Similar questions

A 29-year-old member asked:

Why is the bleeding painless from placenta previa?

3 doctor answers8 doctors weighed in
Dr. Nasiruddin Mansury
Neonatology 17 years experience
Placenta prevIa: The stretching of lower uterine segment causes the disruption in blood supply to the plaventa. The blood usually comes out of the internal os. So this bleeding is painless. Rarely is there is collection of blood behind placenta than it can be painful.
A 35-year-old member asked:

Has anyone ever heard of placenta previa never bleeding before term?

2 doctor answers2 doctors weighed in
Dr. Nasiruddin Mansury
Neonatology 17 years experience
Yes: When placenta previa is partial or incomplete where it does not cover the internal os, it is possible.
NH
A 21-year-old female asked:

Why does placenta previa cause cramping and bleeding?

3 doctor answers5 doctors weighed in
Dr. Gregory Hines
Family Medicine 24 years experience
Bleeding: Placenta previa is the placenta implanting over the internal opening of the cervix, and is a very serious problem. It will necessitate you having a caesarean section, as you will not be able to have a vaginal birth. As to bleeding, it can be very serious, and should be reported to your doctor immediately.
A 41-year-old member asked:

How long does bleeding with placenta previa last?

3 doctor answers6 doctors weighed in
Dr. Michael Sparacino
Family Medicine 37 years experience
See below: It's variable and unpredictable.
A 35-year-old member asked:

Is there a chance of bleeding even after correction of placenta previa?

1 doctor answer2 doctors weighed in
Dr. Jean Steichen
Neonatology 52 years experience
Yes : There is no surgical or mefical treatment yo correct placenta previa however sometimes the placenta can change or move so that it no longer overlies the opening of the cervix if you have true placenta previa it needs to be closely monitored especially the closer you get to going in labor as at that time your cervix will dilate and can cause severe bleeding.

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Last updated Jul 28, 2016

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