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Pregnant, have placenta in posterior upper mid lower causing remote chances of normal delivery. What is the explanation?

HI, I m in my 38th week of pregnancy now. Doctor told that my placenta position is Posterior Upper Mid Lower (away from OS) after an ultrasoung scan yesterday. She also said that my chances of normal delivery is very low due to the placenta position. Could you please explain me about my placenta position and my delivery (whether it can be normal or section)?.
Asked On : Thu, 11 Oct 2012
Answers:  1 Views:  495
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General & Family Physician 's  Response
Dear Mrs Ilakiya you are eager to know about the placenta position and delivery. First of all thanks to use HMC.
Placenta is a structure which connects you with your baby throughout the pregnancy. At about 16th week of pregnancy it is fully grown. It attaches fetal umbilical cord with your uterus. Now the attachment site on uterus may vary individually. Usually it attach to the upper part of the body of uterus. But complication arises when it is attached partially or completely over the lower part of uterus. This condition is called PLACENTA PRAEVIA.
The main complication may be SUDDEN ONSET, PAINLESS, APPARENTLY CAUSELESS, RECURRENT VAGINALBLEEDING which may endanger the mothers as well as fetal life.
Cause- Placental growth slows down in later months but lower part of the uterus continuously dilates, thus shearing force tear the utero placental blood vessel and bleeding occurs.
Now the severity depends upon the exact position. It can be divided in to 4 types-
1) Low lying- majority is in the upper part only the margin encroaches the lower part and away from os.
2) Marginal- placenta reaches up to os but does not cover it.
3) Partial central- Placenta covers the os partially.
4) Central/total- completely over the os.
And this attachment may be in front(anterior) or back (posterior) side of your uterus.
Clinically Type 1
Type 2 anterior
is milder, where as Type 2 posterior, 3 & 4 is major.
According to your USG I think it is Type 1 posterior. So it is not so severe. But when it comes to management there is a provision that milder risk mother can undergone normal delivery but under strict supervision. And if in any step complication arises Caesarean Section should be performed.
Answered: Thu, 11 Oct 2012
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