[Analysis of 42 membrane ruptures during the second pregnancy trimester].

65 cases of premature rupture of the membranes before the 28th week of amenorrhoea occurred during the 5 years between 1983 and 1987 in two maternity units in Paris. A retrospective study was carried out on 42 of these cases where conservative measures had been decided on. In two-thirds of the cases, of which 42% had had bleeding and 40% vaginal infection, the pregnancy had appeared to be progressing normally before the rupture of the membranes.