又名被膜兒、幸帽兒。指胎胞未破,小兒隨胞一起娩出。周紀(jì)?!?a target="_blank" href="/zhongyi/zy52522rj/">女科輯要》五卷:“兒不出胞,連胞生下者,名曰混元生;生后將胞衣掐破,兒既(即)出矣?!?/p>