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Table 3 Incident risk ratio of miscarriage based on the number of short luteal phases in any of the 3 cycles prior to conception

From: Does a short luteal phase correlate with an increased risk of miscarriage? A cohort study

# of short luteal phases < 10 days

Women

Miscarriages

Percent

IRR

95% CI

0

171

32

18.7%

1

  

1

59

13

22.0%

1.18

0.66

2.09

2

16

1

6.3%

0.33

0.05

2.29

3

5

2

40.0%

2.14

0.7

6.55