Conde-Agudelo a, Belizan JM, Lammers C. Maternal-perinatal morbidity and mortality associated with adolescent pregnancy in Latin America: Cross-sectional study.
Conde - Agudelo a, Belizan JM, Lammers C .,《与拉丁美洲少女怀孕有关的孕产-产前发病率和死亡率:截面研究》。
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Foetal development may also be affected by some medications which can cross the placenta during pregnancy.