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Unintended pregnancies are accepted as associated with social, maternal and perinatal risks, but few data exist in South America. In a selected network of hospitals participating in the ECLAMC (Spanish acronym for Latin American Collaborative Study of Congenital Malformations), the frequency of unintended pregnancies was 49.8% in 5155 mothers of normal liveborns, as interviewed in the post-partum period (1992-1994). Compared with the intended pregnancy group, these mothers were more frequently multiparous, conceived easily, had a surprisingly higher mean maternal age, lower educational level, and Black ancestors. The frequency of mistimed pregnancies was the highest among primiparae. No adverse perinatal outcome could be found with regard to low birthweight (&lt; 2500 g), prematurity (&lt; 37 weeks), and early neonatal death. The rates of Caesarean delivery, twinning and sex ratio were similar in intended and unintended groups. Logistic regression analysis showed that maternal education could be a confounding factor associated with other maternal variables. The rate of unintended pregnancies in the present study is significantly higher than that described for other regions. Knowledge of the characteristics of women experiencing unintended pregnancies would allow proper public health strategies.

human reproduction

Unintended pregnancies in women delivering at 18 South American hospitals. NFP-ECLAMC Group. Latin American Collaborative Study of Congenital Malformations