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Table 3 Pregnancy outcomes by cycles and rounds

From: Number of motile spermatozoa inseminated and pregnancy outcomes in intrauterine insemination

Total Cycles

N = 2062

Total

N (%)

Clinical Pregnancy

N [Rate (95% CI)]

P-Value

Overall

 

2062 (100.0)

312 [15.1 (13.6–16.7)]b

 

NMSI (×106)

  < 1

80 (3.9)

3 [3.8 (1.1–9.7)]

0.0007δ

 1–4

283 (13.7)

36 [12.7 (9.2–17.0)]

 5–9

245 (11.9)

30 [12.2 (8.6–16.8)]

  ≥ 10

1454 (70.5)

243 [16.7 (14.9–18.7)]b

 Unknown

3

  

Age (Years)

  < 30

348 (16.9)

59 [17.0 (13.3–21.2)]

0.09δ

 30–34

862 (41.8)

135 [15.7 (13.4–18.2)]

 35–39

723 (35.1)

104 [14.4 (12.0–17.1)]

  ≥ 40

129 (6.3)

14 [10.9 (6.4–17.1)]

OS Protocol

 None

124 (6.1)

6 [4.8 (2.0–9.7)]

0.0003β

 Letrozole or Clomid

210 (10.4)

22 [10.5 (6.9–15.2)]a

 Gonadotropins (± Letrozole or Clomid)

1690 (83.5)

280 [16.6 (14.9–18.4)]a

 Unknown

38

  

Number of Mature Follicles

 1

805 (41.9)

101 [12.6 (10.4–15.0)]a

< 0.0001δ

 2

565 (29.4)

86 [15.2 (12.4–18.4)]

 3

284 (14.8)

59 [20.8 (16.4–25.9)]a

 4

126 (6.6)

28 [22.2 (15.6–30.1)]

  ≥ 5

141 (7.3)

29 [20.6 (14.5–27.8)]

Unknown

141

  

Total Rounds

N = 869

Total

N (%)

Clinical Pregnancy

N [Rate (95% CI)]

 

Overall

 

869 (100.0)

312 [35.9 (32.8–39.1)]

 

Average NMSI (×106)

  < 1

45 (5.3)

4 [8.9 (3.1–19.8)]

< 0.0001δ

 1–4

93 (10.9)

26 [28.0 (19.6–37.6)]

 5–9

74 (8.7)

26 [35.1 (25.0–46.4)]

  ≥ 10

643 (75.2)

249 [38.7 (35.0–42.5)]

Unknown

14

  

Age at Start of Round (Years)

  < 30

162 (18.6)

65 [40.1 (32.8–47.8)]

0.03δ

 30–34

364 (41.9)

136 [37.4 (32.5–42.4)]

 35–39

287 (33.0)

98 [34.1 (28.8–39.8)]

  ≥ 40

56 (6.4)

13 [23.2 (13.7–35.4)]

  1. a1 unknown clinical pregnancy outcome
  2. b2 unknown clinical pregnancy outcomes
  3. δΧ2 test for trend
  4. βΧ2 test