If these symptoms do occur, please seek medical care. Figure 2: Location of the fundal placenta. The placenta praevia occurs when the placenta covers the cervix Figure 3. If placenta covers the cervix partially or fully, this can cause complications throughout your pregnancy. Complications that may occur are bleeding from the placenta and preterm birth. Depending on how blocked the cervix is, this may result in mothers having a cesarean birth rather than a vaginal birth.
Figure 3: Comparison of a normal placenta and placenta praevia. Your specialist will perform the ultrasound and will determine what type of position your placenta is located in. However, if your placenta is in the praevia position this raises some concern as it blocks the cervix.
If you are diagnosed with praevia placenta, there is no medical cure for it. However, there are medical treatments that aim to ease the symptoms throughout your pregnancy. The placenta is an organ that supplies oxygen and nutrients via the umbilical cord to the baby and plays an important role in pregnancy. Anterior placenta : This means that the placenta is located toward the front wall of the uterus.
Posterior placenta : The placenta is attached to the back wall of the uterus. Low Lying Placenta: The placenta is often positioned in the lower segment of the uterus in the early weeks of pregnancy. Kaku, R. Lateral location of placenta on ultrasound as a predictive test for preeclampsia. Norwitz, E. Obstetric Clinical Algorithms 2nd ed. Torricelli, M. Anterior placental location influences onset and progress of labor and postpartum outcome. Placenta , 36 4 , Zia, S. Placental location and pregnancy outcome.
Instagram Facebook. Other locations include: anterior front wall posterior back wall side walls left or right lateral Placenta prevue covering the cervix The blood flow through the uterus is not uniform, so that the bloody supply differs when the placenta is implanted in different areas of the uterus. Having an anterior placenta usually does not negatively impact the pregnancy or birth, however it may: Make it harder to feel your baby as the baby is cushioned by your placenta at the front of your stomach.
This means that usually you feel your baby move later in the pregnancy. However most of the time your baby will rotate to an optimum anterior position during labour and delivery. There is an association between an anterior placenta and increased back pain which has been attributed to the baby being in the back to back position.
It is harder to perform certain tests such as an amniocentesis only if required. Some studies have shown an increase in rates of induction, prolonged rupture of membranes membranes ruptured for longer than 18hrs without contractions beginning , more likely to have a caesarean section due to failure to progress and higher incidence of postpartum haemorrhage blood loss greater than ml at birth and manual removal of the placenta.
When this happens, the placenta generally forms along that wall as well. Doctors refer to this as a posterior placenta. Sometimes, having an anterior placenta may make it harder for a woman to feel fetal movements. In some cases, it can make it more challenging for an obstetrician to detect a fetal heartbeat. Generally, the positioning of the placenta does not affect the pregnancy or the fetus unless the placenta blocks the cervix, which is called placenta previa. A woman with placenta previa may need to stay in the hospital for monitoring, and she is likely to need to give birth via cesarean delivery.
However, an anterior placenta is not likely to affect the pregnancy or its management. The differences in a pregnancy with an anterior placenta are minor.
Having an anterior placenta is quite common. Due to the position of the placenta in front of the baby, a woman with an anterior placenta may not feel fetal movement as strongly as a woman with a posterior placenta, particularly earlier in pregnancy when the fetus is smaller.
In cases where a woman needs an amniocentesis , an anterior placenta may make it slightly more difficult for a doctor to carry out the test. An amniocentesis is a procedure that takes a sample of the amniotic fluid surrounding the baby. A doctor will analyze the fluid for signs of any abnormalities.
The location of an anterior placenta at the front of the uterus may make this more challenging. A doctor can determine the placement of the placenta using an ultrasound , which usually occurs between 18 and 20 weeks of pregnancy.
Sometimes, they may recommend additional ultrasounds closer to the delivery date to check the location of the placenta and ensure that it is not covering the cervix.
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