Table 3.

Embryos exposed to treatment at different stages of development in Fig. 2 experiments

Treatment	Exposure window (Nieuwkoop-Faber embryonic stage)
	2–8	8–45	8–20	8–12.5	12.5–20	20–45
Control (n)	170	385	151	228	98	229
PTU (n)	164	268	141	239	139	162
Experiments (n)	4	7	4	3	3	5

Data apply to Fig. 2A–C.