Table 2. Number of sections used to evaluate each developmental stage.

Developmental stage	Embryonic day	Nº of ED	Nº of OT	Nº of sections/OT	Total Nº of sections/DS
DS1	ED2, ED3, ED4, ED5, ED6	5	6	6	180
DS2	ED5, ED6, ED7, ED8	4	6	6	144
DS3	ED6, ED7, ED8	3	6	6	108
TS3–4	ED6, ED7, ED8, ED9, ED10	5	6	6	180
DS4	ED6, ED7, ED8, ED9, ED10	5	6	6	180
TS4–5	ED7, ED8, ED9, ED10	4	6	6	144
DS5	ED8, ED9, ED10, ED11, ED12	5	6	6	180
TS5–6	ED9, ED10, ED11, ED12	4	6	6	144
DS6	ED10, ED11, ED12	3	6	6	108
TS6–7	ED10, ED11, ED12	3	6	6	108
DS7	ED11, ED12	2	6	6	72