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Table 1 Patient characteristics
| Baseline characteristics, mean (range) | |
| Age (years) | 37.1 (23–53) |
| Gravidity | 2.2 (0–6) |
| Parity | 2.0 (0–5) |
| Weight (kg) | 72.0 (49.2–131) |
| Cycle day | 23.1 (1–66) |
| Method of contraception, number (%) | |
| Hormonal | 42 (50%) |
| Oral contraceptive pill | 31 |
| Evra patch | 4 |
| Depo-Provera | 6 |
| Mirena | 1 |
| Non-hormonal | 42 (50%) |
| Barrier | 24 |
| Other | 4 |
| None | 11 |
| Not recorded | 3 |
| Cycle day | Number (%) |
| 0–10a | 30 (36%) |
| 11–20 | 22 (26%) |
| >20 | 32 (38%) |
| Method of sedation, number (%) | |
| Oral | 26 (31%) |
| Intravenous | 58 (69%) |
