Neural TubeNeural Tube DefectsNeurulationAnencephalyNeural CrestSpinal DysraphismChick EmbryoNervous SystemNotochordCentral Nervous SystemPollen TubeGene Expression Regulation, DevelopmentalBody PatterningFolic AcidQuailIn Situ HybridizationSpina Bifida OccultaCoturnixRhombencephalonSomitesHedgehog ProteinsMorphogenesisEctodermEmbryonic InductionFallopian Tubes