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. 2012 Sep 10;10:78. doi: 10.1186/1477-7827-10-78

Table 1.

Patients and cycle characteristics

Patients N = 474
Female age
30.61 ± 3.31
Cause of subfertility
 
● Unexplained
219 (46)
● Tubal
60 (13)
● Ovulation
103 (22)
● Endometriosis
69 (15)
● Implantation
12 (3)
● Other
11 (2)
● Male factor
339 (72)
Cycles
N = 474
● ICSI
189 (39%)
● IVF
288 (61%)
● Oocytes per oocyte retrieval
10.16 ± 4.71
● Mature oocytes per oocyte retrieval
8.84 ± 4.15
● Fertilization rate per oocyte
65 ± 21.6
● Fertilization rate per mature oocyte
74 ±21.3
Clinical outcome
 
● Positive βhCG
158 (33)
● Biochemical pregnancy
18 (4)
● Implanted embryos
140 (30)
● Extra uterine sac
2 (0.4)
● Intra uterine sac
138 (29)
● Early miscarriagea
18 (4)
● Late miscarriageb
4 (1)
● Induced abortion
1 (0)
● Live birth
115 (24)
Embryo characteristics (n = 474)
Total
● ≤ 5 cell stage
46 (10)
● 6-cell stage
47 (10)
● 7-cell stage
102 (22)
● 8- cell stage 279 (59)

Values are mean ± SD or N(%).

adefined as a miscarriage up to 12 weeks after embryo transfer.

b defined as a miscarriage between 12 and 20 weeks after embryo transfer.