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Table 2 Hourly heart rates (means ± SEM) in 5 Beagle dogs during each reproductive period.

From: Change of Diurnal Heart Rate Patterns During Pregnancy and Lactation in Dogs (Canis familiaris)

Time of day Anoestrus 3-week 5-week 7-week 9-week* Lactation
0:00–1:00 71 ± 9.2 89 ± 4.3 104 ± 4.0 122 ± 4.9 136 ± 14 (2) 94 ± 5.8
1:00–2:00 66 ± 4.8 84 ± 6.5 103 ± 4.6 122 ± 3.0 146 ± 20 (2) 92 ± 2.1
2:00–3:00 62 ± 4.0 85 ± 7.0 101 ± 4.8 125 ± 4.4 134 ± 19 (2) 86 ± 2.5
3:00–4:00 65 ± 2.7 83 ± 6.4 99 ± 5.7 131 ± 4.3 130 ± 16 (2) 85 ± 3,7
4:00–5:00 61 ± 3.5 89 ± 5.5 102 ± 5.2 113 ± 2.1 141 ± 25 (2) 79 ± 3.6
5:00–6:00 66 ± 3.2 92 ± 6.4 103 ± 3.1 113 ± 4.8 152 ± 18 (2) 89 ± 2.6
6:00–7:00 107 ± 5.0 132 ± 3.3 124 ± 7.2 144 ± 3.5 139 ± NA (1) 113 ± 3.2
7:00–8:00 120 ± 4.3 123 ± 4.3 144 ± 3.7 150 ± 4.2 137 ± NA (1) 122 ± 4.2
8:00–9:00 102 ± 6.6 114 ± 6.2 135 ± 8.4 144 ± 3.6 137 ± NA (1) 110 ± 4.5
9:00–10:00 114 ± 3.9 115 ± 7.2 136 ± 3.7 143 ± 3.8 153 ± 5.5 (3) 115 ± 5.9
10:00–11:00 114 ± 5.9 112 ± 9.4 133 ± 2.4 148 ± 5.0 141 ± 5.9 (3) 110 ± 5.4
11:00–12:00 98 ± 8.8 110 ± 6.3 128 ± 3.7 127 ± 4.5 145 ± 6.3 (4) 108 ± 5.1
12:00–13:00 101 ± 8.1 129 ± 15 128 ± 3.7 124 ± 3.9 153 ± 7.0 (5) 110 ± 3.5
13:00–14:00 97 ± 9.1 111 ± 7.3 127 ± 4.1 132 ± 6.2 149 ± 7.6 (4) 120 ± 7.6
14:00–15:00 108 ± 6.5 115 ± 7.2 130 ± 2.7 139 ± 8.2 150 ± 7.5 (4) 122 ± 4.8
15:00–16:00 101 ± 8.5 110 ± 3.7 124 ± 3.4 136 ± 9.6 139 ± 9.5 (3) 112 ± 5.3
16:00–17:00 105 ± 11 107 ± 5.3 122 ± 4.2 130 ± 7.4 136 ± 8.6 (3) 109 ± 4.1
17:00–18:00 104 ± 17 97 ± 7.4 123 ± 5.7 136 ± 12 144 ± 12 (3) 104 ± 6.5
18:00–19:00 91 ± 13 95 ± 7.7 122 ± 8.2 133 ± 11 142 ± 11 (3) 106 ± 5.3
19:00–20:00 97 ± 15 101 ± 4.1 120 ± 8.2 127 ± 10 149 ± 16 (3) 110 ± 2.1
20:00–21:00 89 ± 8.5 96 ± 6.2 119 ± 7.4 124 ± 7.5 151 ± 13 (3) 111 ± 2.9
21:00–22:00 96 ± 14 94 ± 4.0 117 ± 7.3 127 ± 5.3 148 ± 18 (2) 104 ± 3.6
22:00–23:00 80 ± 9.3 95 ± 7.0 119 ± 8.2 122 ± 7.8 144 ± 19 (2) 95 ± 4.5
23:00–24:00 72 ± 5.9 95 ± 4.4 116 ± 7.7 123 ± 5.3 132 ± 10 (2) 97 ± 3.1
  1. *The number in brackets at 9-week denote number of dogs, which were recorded.