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placents : posterior , grade "o" maturity?

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i m 15th week pregnant .
when i was 14 weeks and 3 days pregnant i have done a ultrasound scan of the gravid uterus.
the report are
single live intra uterine foetus noted in breech presentation

placenta : posterior, grade "o" maturity , covering the os, s/o - low lying placenta .

liquor : A F I : adequate

foetal cardiac activity is good (148 bpm/ regular). four chambers shows no obvious abnormality. foetal movements are good.

nuchal translicency : 1.2 mm

cervix length : 30 mm: internal os closed.

foetal biometry :

B P D : 28 mm corresponding to GA 15 weeks 1 day

A C : 75 mm corresponding to GA 14 weeks 0 days

F L : 15 mm corresponding to GA 14 weeks 4 day

E F W by foetal biometry : 52 grams.

the question is

whats is the meaning of placents : posterior , grade "o" maturity, covering the os , s/o -low lying placenta.
and cervix length is 30 mm .

what should be minimum cervix length. and what is the risk.

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replied April 9th, 2012
Pregnancy Q and A Answer A33696
Welcome to ehealthforum,
The report as detailed by you suggest normal scan report. As per the report, the placenta is posterior in position (inside uterine cavity) and low lying covering the internal cervix opening (covering the os). The cervix during scan looks like a tube, 3cm and 5cm in length, with one end at the top of the vagina (the external os), and the other end inside the uterus (the internal os). The normal length of a cervix during pregnancy is 3 centimeters or greater. If the closed part of the cervix measures less than 2.5cm, a stitch will be put in to stop the cervix opening further as your pregnancy progresses (usually done in hospital under a general anesthetic and is removed a few weeks before your due date). Discuss your scan report in detail with your treating gynecologist/obstetrician. Consider being in regular monitoring and follow-up with your treating gynecologist/obstetrician and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet.
Take care.

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