Obs Stats Flashcards
Proportion twin pregnancies
3%
Twin SCBU admissions
15%
Preterm twin deliveries <37 weeks
50%
Preterm twin deliveries <34 weeks
20%
Twin pregnancy rate with IVF
24%
Asymptomatic twins, cx length <25mm, risk of delivery before 28 weeks
25%
Asymptomatic twins, cx length <20mm, risk delivery before 32 weeks
42%
Asymptomatic twins, cx length <20mm, risk delivery before 34 weeks
62%
Premature twins delivered for medical reasons
1/3
Diabetes insipidus rate
2-4 per 100,000
Mortality rate pulmonary hypertension
17%
Mortality idiopathic or congenital heart disease
33%
Preterm delivery pulmonary hypertension
> 85%
Neonatal death with pulmonary hypertension
7-13%
Malignancy in pregnancy
1 in 1000
Re-laparotomy after CS
0.12-1.04%
PPH risk at delivery
- 1% ELCS
6. 0% vaginal birth & CS
Wound infection post CS
EMCS 97 in 1000
ELCS 68 in 1000
Endometritis post CS
EMCS 184 per 1000
ELCS 39 per 1000
Pregnancy VTE risk
4-6 times higher
Success ECV
50%
60% multips
40% primula
Spontaneous breech turn cephalic
8%
3-5% after unsuccessful ECV
Cephalic to breech after ECV
3%
Recurrence breech position
9.9%
EMCS after ECV
0.5%
Breech
3-4% term
Breech in labour
25% diagnosed in labour
Vagina breech conversion to EMCS
40%
2nd twin non-vertex
40%
Success VBAC
72-75%
85-90% if previous VBAC
Uterine rupture VBAC
0.5%
Induced 1.5%
Augmented 1.9%
Uterine rupture rate if previous rupture
5%
V2BAC success
71%
OASIS with VBAC
5%
Instrumental delivery with VBAC
39%
Maternal death CS
13 in 100,000
Maternal death VBAC
4 in 100,000
Risk stillbirth >39 weeks VBAC
0.1%
Hysterectomy with uterine rupture
14-33%
Planned ELCS in labour <39 weeks
10%
Uterine rupture planned ELCS
<0.02%
Uterine rupture in labour
90%
Majority 4-5cm
2nd stage 18%
AN 2%
Abnormal CTG with uterine rupture
66-76%
Asymptomatic uterine rupture
48%
Percentage women offered invasive testing
5%
Weeks for amnio
From 15 onwards
Miscarriage rate amnio/CVS
1%, inc CVS
Weeks for CVS
From 10
Epilepsy in pregnancy
0.5 - 1%
Increased risk SUDEP
10 x increased risk death
Women not having seizure in pregnancy
67%
Epilepsy without AED risk of congenital malformations
2.8% (same as gen pop)
Risk congenital malformation with sodium valproate
10.7%
Risk congenital malformation with poly therapy
16.8%
Tonic clinic seizures in labour
1-2% in labour
1-2% 24 hours after delivery
Status epilepticus in pregnancy
1%
Epilepsy risk for postpartum depression
29%
11% without epilepsy
Minor bleed
<50mls
Major bleed
50-1000mls
Massive bleed
> 1000 mls
APH in pregnancy
3-5%
Association preterm delivery with APH
20%
Risk of placental abruption
4.4% if 1 previous
19-25% if 2 previous
Placental abruption in low risk pregnancies
70%
US detection of placental abruption
25%
Uterine rupture previous 2CS
1.7%
Uterine rupture previous classical CS
12%
VBAC success previous indication
Breech 84%
Distress 74%
Dystocia 64%
Risk placenta praevia
After 1CS 1%
2CS 1.7%
3CS 2.8%
Risk placenta accreta
After 1CS 11-14%
2CS 23-40%
3CS 61%
4CS 67%
Success first attempt amnio/CVS
94%
Miscarriage amnio
1%
Inc CVS
1.8% twin