Placenta previa – causes, symptoms, diagnosis, treatment

Placenta previa is a gestation problem into which implantation of the placenta takes place over or close to the internal of the cervix. The placenta is the organ that is developed at some stage in being pregnant and normally the placenta is connected to the pinnacle or the side of the uterus.

It is connected to the umbilical wire and provides nourishment and protection to the fetus. It additionally filters out the wastes.

During the placenta previa partly or may totally cover the cervix. At the time of regular transport, the infant passes from the uterus to the cervix and bypasses the start canal. As the placenta is currently away from the cervix it poses no hindrance in everyday vaginal delivery.

In case of the delivery at some stage in placenta previa, the cervix opens in labor and motions the blood vessels that are connecting the placenta to the uterus to tear. As a result there will be severe bleeding that can be very risky for the baby and mom both. Almost all the mothers with this circumstance have shipping via Cesarean section.

Types of Placenta Previa

  1.   Comprehensive placental previa happens when the placenta totally refuges cervical original.
  2.   Incomplete placenta previa happens when the placenta in part covers the cervix.
  3.   Peripheral placenta previa is marked by the situation when the placenta is positioned closest to the cervical opening and now not overlaying the cervix.

In case of placenta previa and subsidiary placenta previa both the circumstance is referred to as a low-lying placenta or low places.

Sometimes anterior placenta previa and posterior placenta previa are the terminologies used to outline exactly the correct position of the placenta within the uterus, as described by ultrasound examinations.


The exact reasons associated with the occurrence of the placenta are unknown. It impacts out of 200 pregnant girls during 28-40 weeks of pregnancy. It has been observed that the situation is extra frequent in the woman who has one or more of the following conditions;

  • Multiple pregnancies
  • Uterus with preceding surgical treatment history

A preceding Cesarean birth more than one child

The placenta is found in the decreased part of the uterus overlaying the cervical opening definitely or partly for a variety of reasons.

In girls with the placenta pelvis in the course of the past stages of being pregnant, the placenta normally slides away from the cervical opening as the pregnancy progresses, as a consequence resolving the condition.

At that time the placenta will no longer slide and remain to overlay the cervical opening completely or may additionally be partial.


Symptoms of the placenta that start generally for the duration of late being pregnant is sudden and painless vaginal bleeding. The color of blood might also be bright crimson and serious bleeding might also lead to hemorrhagic shock.

Occasionally the uterine contractions might also occur along with bleeding. Bright red, painless vaginal bleeding at some stage in the 2d 1/2 of being pregnant is the predominant indication of placenta previa. Other symptoms may additionally include premature contractions, the transverse position of the toddler (visualized with ultrasound) and uncommon growth of the uterus.

Risk factors for Placenta Previa

Following are the hazard factors for placenta previa:

Women with preceding pregnancies (multiparity) are at extra risk to increase placenta previa, especially the girl with short-spaced pregnancies are greater likely to face the condition, two

Previous Cesarean part delivery

Uterine abnormalities together with fibroids, endometrium damage brought on via D and C. Among these damages the stipulations that slow down ordinary implantation are of real difficulty.

Previously a surgery on the uterus for instance myomectomy or a method for example a couple of dilation and D&C.

Smoking at some stage in the pregnancy and cocaine inhalation thru smoking

Multifetal being pregnant (enlargement of mum or dad occurs due to it)

Younger maternal age (mother with age much less than 20 are at greater risk)

Older maternal age (mother of extra than 35)

Placenta with pathological stipulations like succenturiate lobes or bilobed.

Unusual positions of infants like breech or transverse.

Maybe the race. It is reported that girls from Asian and African origins have a higher chance than other races, however, some other research found no differences.


The prognosis of placenta previa is made via ultrasound examination during the hobby’s checkup or after the abnormal vaginal bleeding. Usually, the cases are located all through the second trimester.

For the applicable diagnosis of the condition a transvaginal ultrasound (placing a wand-type machine inner the vagina to view the uterus internal) examination is carried out alongside stomach ultrasound. The care is taken no longer to disrupt the placenta.

If the girl is suspected to have a placenta, allow theories routine vaginal exams to be avoided in order to reduce the danger of heavy bleeding. Placenta previa is considered in all ladies with vaginal bleeding after 20 weeks.


There is no logical or careful fix to treatment placenta previa, however there are a few choices to deal with the draining achieved through placenta previa.

Reduced hypertension

Use of aspirin earlier than 16 weeks of being pregnant to stop pre- eclampsia also appears fantastic at stopping placental abruption. Cure depends on the volume of I0>od loss and the popularity of the fetus.

If the fetus is less than 36 weeks and neither mother or fetus are in any distress, then they may additionally simply be monitored in hospital until an alternate in a situation or fetal maturity whichever comes first.

Instantaneous delivery of the fetus may additionally be indicated. If the fetus is ma; time or if the fetus or mom is in distress. Blood quantity substitute to preserve blood strain and blood plasma alternative to maintain fibrinogen ranges may be needed. Vaginal birth is typically favored over Cesarean section except there is fetal distress. The cesarean area contains an extended hazard in intravascular coagulation.

What you need to know

Sadly, placenta previa determination at some stage in the 1/3 trimester implies that you may moreover presently don’t appreciate your optimal starting arrangement. Furthermore, a random data initiated draining occasion, in the event that you trip one, can be alarming.

But since you’re on a cautious post for signs and you perceive that you are searching for immediate treatment on the off chance that you drain, you and your little child will be OK. The most fundamental issue to safeguard as a primary concern: The sizeable higher piece of ladies with placenta previa securely convey healthy infants.


Although the risk of placental abruption can’t be eliminated, it can be condensed. Avoiding tobacco, alcohol, and cocaine at some stage in pregnancy to reduce the risk. Staying away from things to do which have a high hazard of physical trauma is additionally important.

Women who have had a formerly placental abruption and prefer to conceive need to be closely amazed with the aid of a doctor. The risk of placental abruption can be decreased with the aid of keeping a top eating regimen which includes taking folate, everyday sleep patterns, and correction of pregnancy.


All women over 30 years old, with one or extra previous C-sections, posterior placenta and male fetus have to be suspiciously monitored prenatally, as they may also have a higher danger to acquire placenta previa and placenta accrete or percreta.

It is imperative to consult the pregnant lady as soon as the pregnancy is confirmed. Early attention and appropriate monitoring may want to minimize the opportunity of a negative outcome.

Considering a phase of the findings of the current study, which is reminiscent of an underlying hereditary foundation of placenta previa, future research is essential to make clear a possible genetic and/or environmental involvement to danger.

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