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Doctor insights on: Does Placenta Previa Cause Preterm Labor

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Diagnosed with partial/marginal placenta previa (25 wks). Precautions? Worried about preterm labor, placenta has not moved up since 17 wk scan.

Diagnosed with partial/marginal placenta previa (25 wks). Precautions? Worried about preterm labor, placenta has not moved up since 17 wk scan.

Try to relax!: It's still fairly early to be worried. Most patients with marginal placentas deliver vaginally without incident. If this is your first pregnancy your lower uterine segment will not soften until fairly close to term so the placenta may appear to be low until fairly late. As long as there isn't significant vaginal bleeding you shouldn't worry.

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Dr. Andrew Seibert
146 Doctors shared insights

Placenta Blocks Cervix (Definition)

A previa is when a placenta entirely covers the opening of the cervix into the uterus (internal os). It is a reason for a cesarean section and if bleeding occurs and stops it may be a ...Read more


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How does placenta previa cause preterm delivery?

How does placenta previa cause preterm delivery?

Bleeding and Cntrxns: 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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I have placenta previa. How soon can I go into labor and will my baby be safe?

I have placenta previa. How soon can I go into labor and will my baby be safe?

Cesarean by 36-37w.: Placenta previa can lead to preterm labor, so I would recommend prelabor (i.e. Shceuled) cesarean section by 36-37 weeks. If placenta accreta is also suspected, delivery should be by 34-35 weeks with Betamethasone administration and immediate puerperal hysterectomy without attempt at placental delivery! All this shoudl be done in a large hospital. The infant should do well regardless.

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Why does placenta previa cause cramping and bleeding?

Why does placenta previa cause cramping and bleeding?

Placenta previa: Usually bleeding associated with placenta previa is painless. Rarely, if there is separation of placenta and blood is collected retroplacentally, it can be painful.

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Can marginal placenta previa cause placental abruption? What are the statistics on marginal previa moving after 20 weeks?

Can marginal placenta previa cause placental abruption? What are the statistics on marginal previa moving after 20 weeks?

Cervix and placenta: Will move apart
as a balloon expands, (uterus), points on the balloon move apart, this will likely occur as the uterus grows, if no bleeding, little risk of harm. Ask your doctor to be sure.
Previa can create a type of partial abruption, along the edge of the attachment.

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Can cinnoman tea cause preterm labor at 28 weeks if I tested postive for ffn?

Can cinnoman tea cause preterm labor at 28 weeks if I tested postive for ffn?

No: Cinnamon does not cause preterm labor. A positive ffn means you are at high risk for preterm labor.

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Can quiting my ADHD medication cause me to have preterm labor in my third trimester?

Coordinated care: When there is need to taper or stop medications acting on the brain or nervous system, women who are pregnant should ask OB provider about a referral to maternal-fetal medicine specialist and/or neurologist or psychiatrist who prescribed the medication. Then all of the doctors can consider risks and benefits for mom and baby before making a change.

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Can mag withdrawal cause preterm labor?

Can mag withdrawal cause preterm labor?

Preterm labor: Premature labor is caused by inflammation or infection. Magnesium has been used for the treatment of premature labor, but multiple studies have shown that it doesn't really stop contractions. Its use for this indication is declining. Withdrawing an ineffective medication can't cause premature labor.

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Can heavy lifting cause water broke early or can it cause preterm labor?

Can heavy lifting cause water broke early or can it cause preterm labor?

Possible: But unlikely. More probably you would hurt your back. If you have an incompetent cervix or are dilated it is possible the activity of very heavy lifting may cause preterm labor or water to break.

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Is sex safe in the third trimester? Can it cause preterm labor? What positions are best? Is oral sex ok?

Sex 3rd trimester: It is safe to have sex in the third trimester, as long as your partner is positioned so that his weight isn't on your tummy. Lying at the edge of a bed with your partner standing is usually the easiest. It is unlikely to cause preterm labor. Oral sex is ok.

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Will having amnio cause preterm labor?

Will having amnio cause preterm labor?

It can.: Amniocentesis involves introducing a fine needle into the pregnancy sac to retrieve some amniotic fluid for fetal dna testing. That technique had inherent risks for complications, including preterm labor and preterm premature rupture of membranes. The risk for any of these complications to occur is <1%, but is real and devastating if they do occur.

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I don't understand why I went into preterm labor? What are the causes?

Largely unknown...: Pretem labor is a blanket/umbrella diagnosis for a wide spectrum of conditions that result in fetal stress and uterine contractions. Such conditions include: infections, poor growth, placental failure, bleeding, too much amniotic fluid, multifetal pregnancies, trauma, fetal anomalies causing hydrops or heary failure, etc. Most of the time there is no diagnosis and preterm labor is "idiopathic".

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I had a micro preemie at 24 weeks due to a uterine infection that caused preterm labor. How likely am I to have another preemie?

Varies: If it was truly due to an infection and that infection is treated and cured, you would be at no higher risk than usual. However, if there were other contributing circumstances, like early cervical shortening, any abnormalities of uterus, then the risk could be a lot higher. It's an excellent thing to talk to a maternal-fetal medicine specialist about and what you can do pre-pregnancy to prevent.

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Is there fact to too much rubbing belly in first trimester cause increased body temperature that may provoke miscarriage or preterm labor? Doc said so

No: Rubbing the belly surface won't increase one's body temperature inside. The skin may get a little warmer where one rubs. Nothing unusual happens to the baby, because the baby is inside, at a stable temperature. So, if any baby problems arise, they are not due to rubbing the belly surface.

Placenta (Definition)

The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via ...Read more


Dr. Guy VanDell
290 Doctors shared insights

Preterm Labor (Definition)

Preterm labor =regular uterine contractions before 37 weeks of pregnancy with accompanying cervical changes ...Read more