自体受精

例句：

1. 1. In some species of fish, self-fertilization is a natural process that allows the female to produce offspring without the need for external sperm.
   在一些鱼类中，自体受精是一种自然过程，允许雌性无需外部精子就能产生后代。
2. 2. Self-fertilization can lead to genetic diversity in populations, as it allows individuals to mate with different partners and pass on their own genes.
   自体受精可以导致种群中的遗传多样性，因为它允许个体与不同的伴侣交配并传递自己的基因。
3. 3. In humans, self-fertilization is rare but has been observed in certain cases of infertility treatments.
   在人类中，自体受精罕见，但在某些不孕治疗中已被观察到。