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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 18 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 27 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 12 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.

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 18 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 21-year-old female asked:

Why does placenta previa cause cramping and bleeding?

3 doctor answers5 doctors weighed in
Dr. Gregory Hines
Family Medicine 25 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 28-year-old member asked:

What is placenta previa?

4 doctor answers11 doctors weighed in
Dr. Jeff Livingston
Obstetrics and Gynecology 23 years experience
Placenta over cervix: Placenta previa is a complication of pregnancy where the placenta is covering the opening of the uterus called the cervix. It occurs in 1/200 pregnancies more commonly in patients with a previous c section. If diagnosed in early pregnancy it may resolve before delivery. If not a C-section will be needed. It can cause painless bleeding often requiring bedrest.
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 38 years experience
See below: It's variable and unpredictable.
Last updated Jul 28, 2016


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