Dissogony

the capacity for sexual reproduction first in the larval stage and then in the adult form, which is characteristic of some Ctenophora. For example, the larvae of Bolina hydatina form sexual products that are capable of fertilization (eggs and spermatozoa). Later, their sexual glands disappear. Some varieties of adult Ctenophora, in which gonads develop secondarily, are also able to produce progeny.