Table 4.

Uterine rupture case descriptions.

Case	INDEX PREGNANCY					Inter- delivery Interval (month)	SUBSEQUENT PREGNANCY
	Weeks of Gestation	Indication	Incision	Birth weight (gm1)	Complications		Weeks Gestation	Intrapartum Risk Factors	Birth weight (gm1)	Obese	Complications
INDEX PERIVIABLE CASES
1	21	Preterm PROM1, cord prolapse, malpresentation	Low transverse	312	Perinatal stillbirth	13	382		1814	.3	Maternal hemorrhage, obstetric injury, respiratory complication, retained placenta Neonatal respiratory disease
2	22	Preterm labor, puerperal infection, cord prolapse	Classical	454	Neonatal death, low Apgar4	12	34		2098	Yes	Maternal placental abruption, obstetric injury, abnormal fetal heart rate Neonatal ventilation, umbilical vessel catheterization, respiratory disease, jaundice
3	24	Puerperal infection, previa with hemorrhage, cord prolapse, abnormal fetal heart rate	Low transverse	623	Maternal anemia, transfusion, retained foreign body Neonatal death, low Apgar3, ventilation, umbilical vessel catheterization, cutaneous hemorrhage	20	.3		.	.3	Maternal anemia, transfusion Perinatal stillbirth
4	24	Puerperal infection, placental abruption, abnormal fetal heart rate	Classical	695	Neonatal death, low Apgar3, ventilation	12	36		3385	Yes	Maternal anemia, hemorrhage, transfusion, puerperal infection, ileus, failed operative vaginal delivery Neonatal ventilation, hemolytic disease, jaundice, respiratory disease
5	25	Preterm PROM1, malpresentation	Classical	822	Neonatal death, respiratory disease, ventilation, umbilical vessel catheterization	13	36		2665	No	Maternal obstetric injury Neonatal temperature dysregulation, hypoglycemia, jaundice observation for infection
6	25	Preterm labor, puerperal infection, oligohydramnios, malpresentation	Low transverse	790	Neonatal ventilation, retinopathy, anemia, jaundice	63	38		3075	No	Maternal obstetric injury
7	25	Puerperal infection, hypertensive disorder	Classical	595	Maternal pulmonary edema Neonatal death, ventilation, umbilical vessel catheterization, necrotizing enterocolitis, intraventricular hemorrhage, feeding problems, jaundice, electrolyte disturbance	22	38		3275	No	Maternal wound complication
8	26	Preterm labor, puerperal infection malpresentation	Low transverse	709	Neonatal low Apgar3, ventilation	56	223	Intraamniotic infection	1219	No	Maternal placental abruption, puerperal infection, obstetric injury Neonatal ventilation, respiratory disease, pneumonia, parenteral nutrition, metabolic acidosis, fluid overload, electrolyte disturbance, jaundice
INDEX TERM CASES
9	37	Oligohydramnios malpresentation	Low transverse	2807		33	38		2892	No
10	37	PROM1, hypertensive disorder, malpresentation, abnormal fetal heart rate	Low transverse	3334		31	38		3502	No	Maternal wound complication, abnormal fetal heart rate
11	37	Abnormal fetal heart rate, failed operative vaginal delivery	Low transverse	4110	Neonatal ventilation	55	38	Induction	3666	No
12	37	Previa with hemorrhage	Low transverse	3543		22	41	Induction	3968	No	Maternal obstetric injury, abnormal fetal heart rate Neonatal hypoglycemia, observation for infection
13	38	Labor dystocia, abnormal fetal heart rate	Low transverse	2775	Neonatal feeding problems, jaundice	30	36		3655	.3	Placenta previa with hemorrhage Neonatal respiratory disease, observation for infection
14	38	Labor dystocia	Low transverse	3713	Neonatal respiratory disease, observation for infection	15	37		3090	No	Maternal hemorrhage, transfusion, obstetric injury, hysterectomy, bladder injury, respiratory complication, abnormal fetal heart rate Neonatal ventilation
15	38	Hypertensive disorder, suspected macrosomia, labor dystocia	Low transverse	4054	Maternal hemorrhage Neonatal temperature dysregulation, observation for infection, spinal tap	21	38	Induction, labor dystocia	3883	.3	Maternal hypertensive disorder, complication of anesthesia, respiratory complication, vascular complication
16	38	PROM1, puerperal infection, abnormal fetal heart rate	Low transverse	3742	Neonatal respiratory disease, hypoglycemia	25	39		3572	No	Neonatal temperature dysregulation
17	38	Labor dystocia	Low transverse	3798	Neonatal patent ductus arteriosus	44	40		3402	No	Maternal anemia, obstetric injury, abnormal fetal heart rate
18	39		Low transverse	3061		37	37	Labor dystocia	3231	.3	Maternal anemia, hemorrhage, obstetric injury, bladder injury, abnormal fetal heart rate
19	39	Hypertensive disorder, other abnormal labor, abnormal fetal heart rate	Low transverse	3144		33	40	Induction, labor dystocia	3423	.3	Maternal anemia, hemorrhage, obstetric injury, hypertensive disorder, abnormal fetal heart rate
20	39	Malpresentation	Low transverse	3619		34	40		3785	No	Maternal obstetric injury
21	39	Malpresentation	Low transverse	3883	Maternal anemia	37	40	Labor dystocia	4167	No	Maternal obstetric injury Neonatal metabolic acidosis
22	40	Labor dystocia	.3	3713		52	38		3118	Yes	Abnormal fetal heart rate Neonatal observation for infection
23	40	Hypertensive disorder, labor dystocia	Low transverse	3224		24	39		3314	.3
24	40	Hypertensive disorder, labor dystocia	Low transverse	3459	Maternal hepatorenal syndrome Neonatal umbilical vessel catheterization, respiratory disease	19	39	Labor dystocia, augmentation	4706	.3	Neonatal hemorrhagic disease
25	40	Cord prolapse, abnormal fetal heart rate	Low transverse	3856		26	39	Augmentation	2750	No
26	40	Hypertensive disorder, labor dystocia, abnormal fetal heart rate, failed operative vaginal delivery	Low transverse	3175	Neonatal hemolytic disease, jaundice	30	40	Labor dystocia, augmentation	3770	No	Maternal anemia, hemorrhage
27	40	Hypertensive disorder, malpresentation	Low transverse	2835		24	40	Labor dystocia, augmentation	3175	No	Abnormal fetal heart rate
28	40	Malpresentation	Low transverse	3997		30	40	Augmentation	3798	.3	Abnormal fetal heart rate Neonatal low Apgar3, ventilation, respiratory disease, non-mechanical resuscitation, seizures, observation for infection
29	40	Puerperal infection, other abnormal labor	Low transverse	3521		30	40		3827	.3	Maternal bladder injury, abnormal fetal heart rate
30	40	Puerperal infection, hypertensive disorder, labor dystocia, abnormal fetal heart rate	Low transverse	3835		29	40	Labor dystocia	4110	Yes	Abnormal fetal heart rate Neonatal jaundice
31	40	PROM1, labor dystocia	Low transverse	3402		28	41	Induction, prostaglandin use, labor dystocia, intraamniotic infection	3969	.3	Maternal bladder injury, puerperal infection, abnormal fetal heart rate Neonatal respiratory disease, acute tubular necrosis, observation for infection
32	40	Previa with hemorrhage	Low transverse	3373		19	41	Labor dystocia, augmentation	4167	No	Maternal obstetric injury, puerperal infection, wound complication, abnormal fetal heart rate Neonatal jaundice
33	40	Labor dystocia	Low transverse	3969	Maternal obstetric injury, puerperal infection	23	41	intraamniotic infection	3515	No	Maternal puerperal infection, abnormal fetal heart rate Neonatal tachycardia
34	40	Malpresentation, abnormal fetal heart rate	Low transverse	3374		18	.3	Labor dystocia	3374	.3	Neonatal respiratory disease, non-mechanical resuscitation, scalp injury
35	41	Puerperal infection, abnormal fetal heart rate	Low transverse	3941	Maternal 3rd degree laceration Neonatal ventilation, umbilical vessel catheterization	17	38		3714	.3	Maternal obstetric injury, bladder injury
36	41	Puerperal infection, labor dystocia	Low transverse	3799		22	38	Labor dystocia, augmentation, intraamniotic infection	3289	.3	Maternal anemia, hemorrhage, puerperal infection, Abnormal fetal heart rate Neonatal observation for infection, spinal tap
37	41	Labor dystocia	Low transverse	3968		15	38		2636	.3	Maternal hemorrhage, hysterectomy, abnormal fetal heart rate
38	41	Labor dystocia, abnormal fetal heart rate	Low transverse	3770		64	39	Augmentation	2485	No	Maternal anemia, hemorrhage, transfusion, postpartum exploratory laparotomy, obstetric injury, retained placenta, hypertensive disorder, precipitate labor Neonatal Temperature dysregulation, hypoglycemia, jaundice
39	41	Malpresentation	Low transverse	3374		57	39	Induction, prostaglandin use	3395	No	Abnormal fetal heart rate
40	41	Labor dystocia, abnormal fetal heart rate	Low transverse	3611	Maternal anemia	29	39		4140	No	Maternal anemia
41	41	Labor dystocia, abnormal fetal heart rate	Low transverse	3856		21	39	Induction, labor dystocia	3771	No	Maternal pelvic floor abnormality, abnormal fetal heart rate
42	41	Suspected macrosomia	Low transverse	4706		45	40	Augmentation	4195	Yes	Maternal obstetric injury, puerperal infection, abnormal fetal heart rate Neonatal low Apgar3, ventilation, umbilical vessel catheterization
43	41	Herpes simplex virus	Low transverse	3799		23	41	Labor dystocia	3742	No	Maternal obstetric injury
44	41	Labor dystocia	Low transverse	3685		21	41	Augmentation	4309	No	Maternal anemia, hemorrhage
45	41	Labor dystocia, abnormal fetal heart rate	Low transverse	4479		15	41	Labor dystocia	3713	Yes	Maternal anemia, hemorrhage, obstetric injury, failed operative vaginal delivery, abnormal fetal heart rate Neonatal cutaneous hemorrhage, jaundice
46	41	.3	.3	3572		37	42	Induction	3455	No	Abnormal fetal heart rate

¹gm = grams, PROM = premature rupture of membranes.

²Gestational age based on best clinical estimate. For this patient, we noted discordance with birth weight and concordance with alternative gestational age estimation by last menstrual period of 32 weeks.

³. = missing data

⁴Low Apgar defined as less than <5 at 5 or 10 minutes of life.