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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Can I Have Normal Delivery With Thickness Of Thinnest Part Of Lower Uterine Being 3.5 Mm?

Single alive fetus is seen in cephalic presentation.
Fetal heart and limb motion seen and heart rate is 149 beats per minute.
Placenta is posterior left lateral. Maximum thickness is 39 mm. maturity grade II.
There is normal amount of amniotic fluid and AFI is 15 cm.
Femur length measures 62.5 mm, which is equal to 31 weeks and 06 days
Biparietal diameter is 79.9 mm, which is equal to 31 weeks and 6 days.
Abdominal circumference is 270 mm, which is equal to 31 weeks
\estimated fetal weight is 1832+/- 457 grams.

Estimated gestational age is 31 weeks and 4 days.
Gestational age according to LMP is 31 weeks and 6 days

Thickness of thinnest part of lower uterine segment is 3.5 mm.
Cervical length is 40 mm.
Expected date of delivery according to LMP is 16/04/2014.
Estimated Expected date of delivery is 18/04/2014.
(History: I had history of one C-section in august 2012 due to placental abruption.)
I want to give vaginal birth this time is it possible? Is baby and its growth is fine?
Tue, 25 Feb 2014
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OBGYN 's  Response
Hello
Thanks for writing to us with your health concern.
Basically, after one C section, trial of normal labour is called VBAC - vaginal birth after Cesarean section.
Ideally it should be attempted when the gap between the two pregnancies ( deliveries ) is atleast 18 months.
So that way too it is risky for you to attempt VBAC.
The parameters which estimate the gestational age of the fetus are all normal.
Also, the cervical length is fine.
What is worrisome is the thickness of the lower uterine segment.
That estimates the integrity of the scar of the previous C section.
When it measures less than 4 mm, there are increased chances of rupture ( giving way ) of this scar while attempting labour the next time.
In your case, it is 3.5 mm, so it is definitely thinned out.
So please weigh the increased risks of attempting VBAC this time.
I would advice a planned C section, as that is the best bet for you.
All the best
Take care.
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Can I Have Normal Delivery With Thickness Of Thinnest Part Of Lower Uterine Being 3.5 Mm?

Hello Thanks for writing to us with your health concern. Basically, after one C section, trial of normal labour is called VBAC - vaginal birth after Cesarean section. Ideally it should be attempted when the gap between the two pregnancies ( deliveries ) is atleast 18 months. So that way too it is risky for you to attempt VBAC. The parameters which estimate the gestational age of the fetus are all normal. Also, the cervical length is fine. What is worrisome is the thickness of the lower uterine segment. That estimates the integrity of the scar of the previous C section. When it measures less than 4 mm, there are increased chances of rupture ( giving way ) of this scar while attempting labour the next time. In your case, it is 3.5 mm, so it is definitely thinned out. So please weigh the increased risks of attempting VBAC this time. I would advice a planned C section, as that is the best bet for you. All the best Take care.