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Table 9 Fetal heart rate (female), beats per minute

From: Sex differences in umbilical artery Doppler indices: a longitudinal study

Gestation (week)

2.5th percentile

5th percentile

10th percentile

25th percentile

Mean

75th percentile

90th percentile

95th percentile

97.5th percentile

20

131

134

137

142

147

153

158

161

164

21

131

133

136

141

146

152

157

160

163

22

130

132

135

140

146

151

156

159

162

23

129

132

134

139

145

151

156

159

161

24

128

131

134

139

144

150

155

158

161

25

127

130

133

138

144

150

155

158

161

26

127

129

132

138

143

149

154

157

160

27

126

129

132

137

143

149

154

157

160

28

125

128

131

136

142

148

154

157

160

29

125

127

131

136

142

148

153

156

159

30

124

127

130

135

141

147

153

156

159

31

124

126

130

135

141

147

153

156

159

32

123

126

129

135

141

147

152

156

159

33

123

125

129

134

140

147

152

156

159

34

122

125

128

134

140

146

152

156

159

35

122

124

128

133

140

146

152

155

158

36

121

124

127

133

139

146

152

155

158

37

121

124

127

133

139

146

152

155

158

38

120

123

127

132

139

145

151

155

158

39

120

123

126

132

139

145

151

155

158

40

120

123

126

132

138

145

151

155

158

  1. Sex-specific reference values of the fetal heart rate (HR) for the 2.5th, 5th, 10th, 25th, 50th, 75th, 90th, 95th, and 97.5th percentiles during the second half of pregnancy (female fetuses)