Development of daily rhythmicity in heart rate and locomotor activity in the human fetus

Table 4 EEG and locomotor activity of the fetus in "active" hours (from 7 p.m. to 4 a.m.) (36 – 40 weeks gestation)

Time (h)	Type	Duration					Time (h)	Duration
		Oscillation type		Fetal movements		Recording		Oscillation type		Fetal movements		Recording
		Min	Sec.	Min	Sec.	Min		Min	Sec.	Min	Sec.	Min
19–20	I	3 ± 0.1	-	4	50 ± 0	54 ± 0.1	24–1	2 ± 0.2	-	4 ± 0.1	-	53 ± 0.2
	II	15 ± 0.2	-	-	-			14 ± 0.1	-	-	-
	III	4 ± 0.1	-	-	-			4 ± 0.4	-	-	-
	IV	32 ± 0.2	-	-	-			33 ± 0.4	-	-	-
20–21	I	-	10 ± 0.2	4 ± 0.2	-	30 ± 0.2	1 – 2	1 ± 0.1	-	6 ± 0.3	-	34 ± 0.4
	II	10 ± 0.1	-	-	-			11 ± 0.2	-	-	-
	III	5 ± 0.1	-	-	-			7 ± 0.4	-	-	-
	IV	15 ± 0.2	-	-	-			15 ± 0.2	-	-	-
21–22	I	-	-	3 ± 0.1	-	39 ± 0.3	2 – 3	1 ± 0.2	-	4 ± 0.2	-	53 ± 0.1
	II	12 ± 0.4	-	-	-			18 ± 0.1	-	-	-
	III	22 ± 0.4	-	-	-			7 ± 0.1	-	-	-
	IV	15 ± 0.3	-	-	-			27 ± 0.2	-	-	-
22–23	I	I	40 ± 0.2	16 ± 0.2	-	26 ± 0.3	3 – 4	-	30 ± 0.3	3	30 ± 0.2	31 ± 0.2
	II	7 ± 0.1	-	-	-			9 ± 0.1	-	-	-
	III	-	-	-	-			7 ± 0.1	-	-	-
	IV	18 ± 0.3	-	-	-			15 ± 0.3	-	-	-
23–24	I	1 ± 0.3	-	3 ± 0.2	-	58 ± 0.1	Total from 19-4	12	20 ± 0.21	43	20 ± 0.16	388 ± 0.21
	II	23 ± 0.3	-	-	-			123 ± 0.15	-
	III	5 ± 0.2	-	-	-			44 ± 0.17	-
	IV	29 ± 0.4	-	-	-			200 ± 0.26	-