Template:Critical Periods table

Critical Periods of Human Development
Conceptus		Embryonic development (weeks)													Fetal period (weeks)
1	2	3		4			5	6		7		8			9		16	20-36	38
		Neural
			Heart
				Upper limbs
					Lower limbs
					Ear
						Eye
									Palate
									Teeth
											External genitalia
Loss		Major abnormalities										Functional and Minor abnormalities
Critical Period Links: critical period | abnormal development | Critical Periods table | Image - Critical Periods table | Genital | Opioids | Neural | Thalidomide | Environmental