Spontaneous sternal fracture in multiparous woman during labor: a case report.

Background: Spontaneous sternal fracture is an extremely rare cause of chest pain during or after childbirth. To date, only three cases of sternal fracture during childbirth have been reported. This case report represents the first documented case of spontaneous sternal fracture among multiparous women. Case Description: A 33-year-old multiparous woman with an uncomplicated medical history is described, who delivered a healthy fourth infant vaginally at 41 weeks of pregnancy. After the previous three deliveries, each child had been breastfed for more than a year, and the third delivery was eight months before conception, and she breastfed until 3 months of pregnancy. During the final stage of labor, while performing the Valsalva maneuver in the lithotomy position, she felt a sharp, severe chest pain. Postpartum work-up included cardioselective enzymes that were within reference values, and radiological work-up confirmed a non-displaced sternal fracture, which was treated conservatively with symptomatic therapy, with complete recovery after 6 weeks. Conclusions: This case report suggests the need to consider sternal fracture as a differential diagnostic consideration in women who experience chest pain during or immediately after delivery. Changes in metabolism, especially calcium metabolism during pregnancy and lactation, can result in transient osteopenia and, with increased mechanical stress, cause bone fracture. Special attention should be paid to patients who breastfed immediately before conception or who breastfeed during pregnancy, to vitamin and mineral replacement therapy, adequate nutrition, and physical activity. Timely diagnosis of sternal fracture can significantly reduce the need for expensive and invasive diagnostic tests. Further research is needed on osteopenia in pregnant women, especially multiparous women who are breastfeeding immediately before conception or during pregnancy.