Infertility and spontaneous abortion - Spontaneous abortion, habitual abortion
Probability of spontaneous abortion with a given history
| Type of study | Number of previous abortions | |||
| 0 | 1 | 2 | ≥3 | |
|
Retrospective studies Warburton and Fraser (1964) Stevenson et al. (1959) Leridon (1976) Naylor and Warburton (1978) |
12.3 15.2 11.0 |
26.2 16.8 22.0 20.3 |
32.2 19.2 35.3 29.2 |
30.2 26.2 37.0 |
|
Cohort studies Shapiro et al. (1970) Awan (1974) Prospective studies Boué et al. (1975) Lauritsen (1976) Harger et al. (1983) Fitzimmons et al. (1983) |
10.9 10.4 |
18.0 22.1 13.8 13.2 |
27.4 17.4 31.3 |
24.9 32.5 29.2 45.7 |