Table 1 Clinical characteristics of the study population
Parameter | Value |
|---|---|
Patients (n) | 30,416 |
Age (years) | 30.4 ± 4.4 |
BMI (kg/m2) | 21.8 ± 2.8 |
Infertility duration (years) | 4.8 ± 3.4 |
Transfer cycle (n) | 1.2 ± 0.6 |
Infertility type | |
Primary | 13,971 (45.9%) |
Secondary | 16,445 (54.1%) |
Cause of infertility | |
Male | 2513 (8.3%) |
Female | 17,946 (59.0%) |
Combined female and male factors | 8859 (29.1%) |
Unexplained | 1098 (3.6%) |
Insemination methods | |
IVF | 14,445 (47.5%) |
ICSI | 5723 (18.8%) |
IVF/ICSI | 10,213 (33.6%) |
PGD | 35 (0.1%) |
Embryo type | |
Fresh | 20,168 (66.3%) |
Frozen | 10,248 (33.7%) |
Mode of delivery | |
Spontaneous delivery | 8165 (26.8%) |
Caesarean section | 22,251 (73.2%) |
Birth weight (g) | 3350.0 ± 240.0 |
5th centile | 2550.0 |
50th centile | 3350.0 |
95th centile | 4100.0 |