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Table 4 Probabilities of semen analysis showing any motile sperm or 1 million sperm/mL or more by vasectomy occlusion technique, early recanalization status, and number of weeks after vasectomy.

From: Frequency and patterns of early recanalization after vasectomy

Week Semen analysis with any motile sperm Semen analysis with 1 × 106 sperm/mL or more
  Vasectomy Technique Vasectomy Technique
  LE LE and FI ECa TC and FIa LE LE and FI ECb TC and FIb
  n/N (%)c n/N (%) n/N (%) n/N (%) n/N (%) n/N (%) n/N (%) n/N (%)
Recanalization
<5 45/105 (43) 21/41(51) 2/7 (29) 0 24/105 (23) 11/40 (28) 4/15 (27) 0
5–6 76/90 (84) 26/37 (70) 8/8 (100) 0 66/90 (73) 22/37 (59) 8/13 (62) 0
8–10 76/96 (79) 29/38 (76) 7/9 (78) 0 61/96 (64) 24/38 (63) 8/17 (47) 0
12–14 55/91 (60) 19/38 (50) 3/7 (43) 0 41/91 (45) 16/38 (42) 1/11 (9) 0
16–18 36/75 (48) 12/27 (44) 2/6 (33) 0 21/75 (28) 8/27 (30) 2/12 (17) 0
20–22 17/52 (33) 8/20 (40) 2/8 (25) 0 13/52 (25) 5/20 (25) 2/11 (18) 0
24–26 11/30 (37) 6/12 (50) 2/7 (28) 0 6/30 (20) 3/12 (25) 2/12 (17) 0
No recanalization
<5 87/300 (29) 121/349 (35) 29/85 (34) 14/93 (15) 75/300 (25) 87/349 (25) 46/170 (27) 28/177 (16)
5–6 39/245 (16) 17/298 (6) 13/79 (16) 2/86 (2) 19/245 (8) 14/298 (5) 15/153 (10) 7/163 (4)
8–10 12/236 (5) 4/279 (1) 3/82 (4) 0/80 (0) 9/236 (4) 7/279 (3) 3/154 (2) 1/162 (1)
12–14 8/170 (5) 6/162 (4) 0/81 (0) 0/83 (0) 8/170 (5) 4/162 (2) 0/155 (0) 0/160 (0)
16–18 5/94 (5) 2/104 (2) 0/89 (0) 0/90 (0) 4/94 (4) 2/104 (2) 0/154 (0) 0/159 (0)
20–22 3/57 (5) 0/62 (0) 0/91 (0) 0/83 (0) 4/57 (7) 0/62 (0) 0/151 (0) 0/160 (0)
24–26 4/41 (10) 1/46 (2) 0/91 (0) 0/62 (0) 4/41 (10) 1/46 (2) 0/127 (0) 0/128 (0)
  1. FI = fascial interposition, LE = ligation and excision, EC = electrocautery, TC = thermal cautery
  2. a restricted to the two centers in the cautery study that had information about motility.
  3. b includes all centers in the cautery study.
  4. c n/N (%) = the number of men with the outcome of interest (semen analysis with any motile sperm or with 1 × 106 sperm/mL or more) divided by the total number of men who provided a semen sample for a given vasectomy technique and early recanalization status for that time period.