birth or in the immediate neonatal period. Bochdalek hernias are the most prevalent CDH in neonates: 1 in 2200 births [2]. Clinical apparition for the first time in the adult period is rare and pregnancies complicated by Bochdalek hernia are even more unusual (to our knowledge 44 cases, including this one, have been reported in the literature since 1928).However, we don´t know the true prevalence of this kind of hernia in adults. Mullins et al published incidence in adults of 0.17%, based on the 13 138 abdominal computerized tomography (CT) scans reviewed [3]. In their review, 68% of Bochdalek hernias were on the right side, 18% were on the left, and 14% were bilateral. They were found to be more frequent in women than in men (17:5) and Mullins results show that right-sided Bochdalek hernias are more common than we believed up to now in asymptomatic patients (incidental hernias). The left-sided presentation in our patient agrees with the majority of symptomatic cases reported, accounting for 80-90% of all cases [4,5].When this kind of hernias appear in adult, it is believed that an anatomical failure previously existed, and the hernia is possibly triggered by a trauma or increased abdominal pressure like pregnancy and delivery. In fact, the number of adults with asymptomatic congenital diaphragmatic hernia remains unknown and in women, it may not debut until pregnancy [6]. Symptomatic diaphragmatic hernias during pregnancy, labor and delivery are rare, but the potential consequences are significant. Because of their symptoms simulate other conditions more common in pregnancy, diagnosis and treatment may be delayed, resulting in excessive mortality among these patients [7].We describe an unusual case of a pregnant patient diagnosed with left-sided Bochdalek hernia in her third trimester that we consider interest publication for obstetrical practice. Case PresentationA 32-year-old primiparous woman was admitted to a local hospital (29 weeks´ gestation) because of her gastrointestinal clinic: nausea, vomiting and epigastric pain for three days. She presented normal depositions and no dyspnea. The patient had no medical history of interest. On physical examination, she was afebrile with Abstract Background: Maternal congenital diaphragmatic hernia complicating pregnancy is an unusual but severe pathology. We only noticed 43 reports on this subject in English between 1959 and 2014.

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