Magnetic resonance imaging during coitus (8 couples) and sexual arousal (11 women)
| Experiment | Age (man/woman) | Weight/height (man/woman) | No of children | Contraception | Female orgasm | Penetration | Details |
|---|---|---|---|---|---|---|---|
| 1 | 41/40 | 0.33/0.39 | 1 | Vasectomy | No | Complete | Movement artefact (1991) |
| 2 | 43/42 | 0.33/0.39 | 1 | Vasectomy | No | Complete | Movement artefact (1993) |
| 3 | 21/20 | 0.31/0.30 | 0 | Oral | No | Partial | Movement artefact (1996) |
| 4 | 23 | 0.35 | 0 | Oral | Yes | No | No partner |
| 5 | 40 | 0.40 | 3 | No | Yes | No | No partner |
| 6 | 35 | 0.37 | 0 | Oral | Yes | No | No partner |
| 7 | 20/21 | 0.32/0.30 | 0 | Oral | Yes | Partial | No |
| 8 | 23/21 | 0.38/0.34 | 0 | Oral | Yes | Partial | No |
| 9 | 28/27 | 0.35/0.30 | 0 | No | Yes | Nearly complete | No |
| 10 | 24/21 | 0.39/0.40 | 0 | Oral | Yes | Nearly complete | Uterus in retroversion |
| 11 | 26/26 | 0.35/0.33 | 0 | Oral | Yes | Nearly complete | No |
| 12 | 25/22 | 0.39/0.40 | 0 | Oral | No | Complete | Sildenafil 25 mg; uterus in retroversion (1998) |
| 13 | 28/28 | 0.35/0.33 | 0 | Oral | No | Complete | Sildenafil 25 mg |