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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.