Sexual reproduction also occurs. Most flatworms are hermaphrodite and, in tapeworms, self-fertilization usually takes pl也有有性生殖。大多数的扁虫雌雄同体，绦虫常常进行自体受精。
Chlorophyll Fluorescence Analysis of Hermaphrodite and Male Gametophytes from Ceratopteris thalictroides(L.) Brongn.on D培养基对不同性别水蕨配子体叶绿素荧光特性的影响