Abstract
In this article which was published in Int J Fertil Steril , Vol 6, No 3, Oct-Dec 2012, on Pages: 175-178, the authors found that Four samples from the control group were incorrectly included in the study. 4 cases were removed from the data and the data were re-analyzed. The results in Tables 1-3 are corrected. The authors would like to apologies for any inconvenience caused.
Results
A total of 126 couples participated: 65 in group 1 (HCG group) and 61 in group 2 (control group). The demographic and basic characteristics of patients are shown in Table 1.
There were no statistically significant differences between groups regarding age (P=0.696), duration of infertility (P=0.222), basal follicle stimulating hormone (P=0.061), BMI (P=0.526), and etiology of infertility (P=0.294). The cycle characteristics and outcome of vitrification are shown in Table 2.
There were no statistically significant differences between groups regarding the numbers of thawed embryos, numbers of transferred embryos, survival rates of thawing embryos and duration of freezing. Table 3 shows the outcome of ART cycles. Implantation, chemical pregnancy, clinical pregnancy, ongoing pregnancy, and abortion rates were similar in both groups.
Table 1.
Basic patient characteristics in the two groups
|
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|---|---|---|---|
| Variables | HCG group | Control group | P value |
|
| |||
| Age (Y) | 28.47 ± 4.14 | 28.74 ± 3.55 | 0.696 |
| Duration of infertility (Y) | 6.58 ± 2.9 | 5.96 ± 2.68 | 0.222 |
| Basal FSH (IU/L) | 5.15 ± 1.66 | 5.72 ± 1.70 | 0.061 |
| BMI (kg/m2) | 23.67 ± 2.43 | 23.95 ± 2.39 | 0.526 |
| Etiology of infertility | |||
| Ovulatory | 13 (20) | 11 (18) | 0.294 |
| Tubal | 9 (13.8) | 10 (16.4) | |
| Unexplained | 0 (0.0) | 3 (4.9) | |
| Mixed | 42 (64.6) | 34 (55.7) | |
| Male | 1 (1.5) | 3 (4.9) | |
| Total | 65 (100) | 61 (100) | |
|
| |||
Data are presented as mean ± SD or n (%). HCG; Human chorionic gonadotropin, FSH; Follicle-stimulating hormone, and BMI; Body mass index.
Table 2.
Cycle characteristics and outcome of vitrification
|
| |||
|---|---|---|---|
| Variables | HCG group | Control group | P value |
|
| |||
| Duration of freezing (months) | 6.58 ± 3.1 | 6.18 ± 2.74 | 0.445 |
| Number of thawed embryos | 2.96 ± 0.17 | 2.88 ± 0.32 | 0.068 |
| Survival rate after thawing (%) | 91.79 ± 0.20 | 94.54 ± 0.12 | 0.369 |
| Numbers of transferred embryos | 2.73 ± 0.44 | 2.57 ± 0.49 | 0.052 |
|
| |||
Data are presented as mean ± SD. HCG; Human chorionic gonadotropin.
Table 3.
ART outcome in both groups
|
| |||
|---|---|---|---|
| Variables | HCG group | Control group | P value |
|
| |||
| Implantation rate (%) | 21.02 | 17.44 | 0.488 |
| Chemical pregnancy rate, n (%) | 27 (41.5) | 25 (41.0) | 0.950 |
| Clinical pregnancy rate, n (%) | 22 (33.8) | 20 (32.8) | 0.900 |
| Ongoing pregnancy rate, n (%) | 20 (30.8) | 18 (27.7) | 0.878 |
| Miscarriage rate, n (%) | 7 (25.9) | 7 (28.0) | 0.866 |
| Endometrial thickness (mm) | 8.83 ± 1.6 | 9.08 ± 1.10 | 0.427 |
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| |||
Data are presented as mean ± SD or n (%) or %. HCG; Human chorionic gonadotropin, ART; Assisted reproductive technology.