|  O66 |  | Other obstructed labor   | 
|  |  | 
	
		|  O66.0 |  | Obstructed labor due to shoulder dystocia |  
		|  |  | 
| Impacted shoulders |  
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  | 
|  |  | 
	
		|  O66.1 |  | Obstructed labor due to locked twins |  
		|  |  | 
	
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  | 
|  |  | 
	
		|  O66.2 |  | Obstructed labor due to unusually large fetus |  
		|  |  | 
	
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  | 
|  |  | 
	
		|  O66.3 |  | Obstructed labor due to other abnormalities of fetus |  
		|  |  | 
| Dystocia due to fetal ascites |  | Dystocia due to fetal hydrops |  | Dystocia due to fetal meningomyelocele |  | Dystocia due to fetal sacral teratoma |  | Dystocia due to fetal tumor |  | Dystocia due to hydrocephalic fetus |  
		| UseAdditionalCode | code to identify cause of obstruction 
 |  
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  | 
|  |  | 
	
		|  O66.4 |  | Failed trial of labor |  |  |  | 
	
		|  O66.40 |  | Failed trial of labor, unspecified |  
		|  |  | 
	
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  |  |  |  | 
	
		|  O66.41 |  | Failed attempted vaginal birth after previous cesarean delivery |  
		|  |  | 
	
		| CodeFirst | rupture of uterus, if applicable (O71.0-, O71.1) 
 |  
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  |  | 
|  |  | 
	
		|  O66.5 |  | Attempted application of vacuum extractor and forceps |  
		|  |  | 
| Attempted application of vacuum or forceps, with subsequent delivery by forceps or cesarean delivery |  
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  | 
|  |  | 
	
		|  O66.6 |  | Obstructed labor due to other multiple fetuses |  
		|  |  | 
	
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  | 
|  |  | 
	
		|  O66.8 |  | Other specified obstructed labor |  
		|  |  | 
	
		| UseAdditionalCode | code to identify cause of obstruction 
 |  
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  | 
|  |  | 
	
		|  O66.9 |  | Obstructed labor, unspecified |  
		|  |  | 
| Dystocia NOS |  | Fetal dystocia NOS |  | Maternal dystocia NOS |  
		| sex | Female 
 |  
		| age | Maternity: [12-55] 
 |  |  |