Homothallic reproduction is characterized by the fusion of the asexual oogonium and antheridium. Oospores are sexual spores produced by the fusion of an antheridium and oogonium. It can be an oogonium, an oocyte, or an ootid. Small male filaments are likely to be attached to a female filament, near an oogonium. The female egg matures in the oogonium until the male sperm fertilizes it. In each oogonium are 1-2 diclinous antheridia coming out far away from the oogonial stalk. Two eggs are produced from each oogonium and 64 sperm are produced from each spermatogonangium.