Stethoscopes were also developed for obstetrical and pediatric auscultation. Laennec's friend Jacques-Alexandre Lejumeau de Kergaradec was the first doctor to use the stethoscope for fetal auscultation and this technique was discussed by Laennec in his second edition text on auscultation. The fetal stethoscopes that emerged usually had a very wide or flaring bell and a wide ear plate, which prevented the stethoscope from rocking on the abdomen of the mother during fetal auscultation.