Male Ascaris is monorchis (monadelphic) ie, it has single teses. Its reproductive organs include a vas deference, a seminal vesiccle and ejaculatory duct, cloaca and pineal setae. Female Ascaris is Didelphic ie, it has two ovaries they are like testes, long, thin and coiled tube like structures lying opposite to each other in about 2/3 rd posterior part of pseudocoel.