title: Dynamic mammalian cardiogenesis investigated by high-resolution ultrasound in guinea pigs.
mesh_terms: D000818:Animals; D005260:Female; D005318:Fetal Heart / Q000032:analysis*; D005865:Gestational Age; D006168:Guinea Pigs; D006321:Heart / Q000196:embryology*; D008855:Microscopy, Electron, Scanning; D011247:Pregnancy; D014463:Ultrasonography