Table 1.
Demographics and clinical characteristics of the subjects (n = 415)
| Characteristics | Data |
|---|---|
| Age (years) | 30 (27–35) |
| BMI (kg/m2) | 21.5 (19.8–23.7) |
| Ethnicity | |
| Han | 402 (96.9) |
| Other | 13 (3.1) |
| Smoking | |
| Non-smoker | 394 (94.9) |
| Former smoker | 19 (4.6) |
| Current smoker | 2 (0.5) |
| Gravidity | |
| Yes | 186 (44.8) |
| No | 229 (55.2) |
| Duration of infertility (years) | 3 (1.5–5.0) |
| IVF/ICSI treatment indication | |
| Tubal or pelvic factor infertility | 166 (40.0) |
| Ovulation disorders | 40 (9.6) |
| Diminished ovarian reserve | 56 (13.5) |
| Endometriosis | 23 (5.5) |
| Uterine disorders | 13 (3.1) |
| Male factor | 99 (23.9) |
| Unexplained | 18 (4.3) |
| AFC | 12 (8–18) |
| AMH (ng/mL) | 3.90 (1.96–6.99) |
| INHBa (pg/mL) | 82 (59–104) |
BMI: body mass index; IVF: in vitro fertilization; ICSI: intracytoplasmic sperm injection; AFC: antral follicle count; AMH: anti-Müllerian hormone; INHB: inhibin B
Data are median [IQR (interquartile range)] or number (%)
aSerum INHB levels were measured in 404 women