There is a wide divergence of opinion concerning the interval a woman
should wail after a miscarriage before attempting a new pregnancy (''p
regnancy interval''). Many authors recommend waiting 3-4 months in ord
er to reduce the risk of another miscarriage [3, 6, 17, 21]. This retr
ospective study investigated whether a longer pregnancy interval lower
s the risk of repeal miscarriage (R-risk) and/or prematurity. The asso
ciation between parity and R-risk was also analyzed. Results showed th
at there are no proven reasons to recommend a waiting period between a
miscarriage and a subsequent pregnancy, because the R-risk was around
20% irrespective of interval duration. Prematurity too is not influen
ced by a wailing period after miscarriage. There was, however, an asso
ciation between parity and R-risk and risk of prematurity: nulliparae
were more likely to have a repeat miscarriage (p < 0.05) or a preterm
delivery in the next pregnancy (p < 0.05) than women who had already g
iven birth to a child.