| 
							  Beginning of organ formation:							 | 
							 | 
							
							  Five Weeks 
							 Gestational Age
							 | 
						  
						  
							| 
							  Major organs have formed:							 | 
							 | 
							
							  Ten Weeks 
							 Gestational Age
							 | 
						  
						  
							
							  End of first trimester 
							 (12 weeks) - Risk of  miscarriage decreases:
							 | 
							 | 
 
							
							  11 to 14 Weeks 
							 Gestational Age
							 | 
						  
						  
							
							  Some preemies can now  
							  survive (23	weeks):
							 | 
							 | 
							
							  23 Weeks 
							 Gestational Age
							 | 
						  
						  
							
							  End of second  
							  trimester (27 weeks):
							 | 
							 | 
							  | 
						  
						   
							
							  Estimated due date 
							  (40 weeks - full term):
							 | 
 
							 | 
							  |