Batch fecundity and spawning frequency are necessary for evaluating the reproductive potential of multiple spawners, and the reproductive potential is a key mechanism determining fish recruitment and developing sound biological assumptions for stock assessment. The study of batch fecundity and spawning frequency started in the 1980s. During these last thirty years, hydrated oocytes method is the most popular for estimating population batch fecundity, and postovulatory follicles method is the best for population spawning frequency. Though the two methods have some defects, they are undeniably to be the most practical and proven methods.