Table I.
Baseline characteristics of the included couples in a randomised controlled trial of fresh or frozen embryo transfer.
| Freeze all | Conventional | ||
|---|---|---|---|
| Women randomised (n) | 102 | 102 | |
| Treatment centre | |||
| AMC | 72 | 72 | |
| OLVG | 30 | 30 | |
| Maternal age (year) | 35.2 ± 4.7 | 35.1 ± 4.5 | |
| Paternal age (year) | 37.5 ± 6.2 | 38.6 ± 7.5 | |
| Duration of subfertility (year) | 3.0 ± 2.1 | 3.2 ± 2.4 | |
| Primary diagnosis of subfertility | |||
| Tuba factor | 10 (10) | 11(11) | |
| Anovulation | 2 (2) | 3(3) | |
| Endometriosis | 1 (1) | 1(1) | |
| Cervix factor | 1 (1) | 0(0) | |
| Male subfertility | 56 (55) | 54 (53) | |
| Unexplained | 28 (28) | 25 (25) | |
| Mixed female and male factor | 4 (4) | 8 (8) | |
| Sperm donor | |||
| Yes | 10 (10) | 5 (5) | |
| No | 92 (90) | 96 (95) | |
| Parity | 0.22 ± 0.6 | 0.27 ± 0.6 | |
| Smoking | |||
| Yes | 16 (16) | 16 (16) | |
| No | 81 (79) | 79(77) | |
| Education | |||
| Primary school | 2 (2) | 1 (1) | |
| Intermediate vocational education | 23 (23) | 33 (32) | |
| Higher general education | 3 (3) | 6 (6) | |
| Higher education/university | 56 (55) | 42 (41) | |
| Not reported | 18 (18) | 20 (20) | |
| Mean BMI (kg/m2) | 23.6 ± 3.6 | 25.1 ± 5.0 | |
| Antral follicles | 9.4 ± 6.8 | 11.6 ± 8.9 |
AMC, Academic Medical Centre; OLVG, Onze Lieve Vrouwe Gasthuis. Data presented as means ± SD or number (%)