External fertilization is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. It is...

unlike its counterpart, external fertilization, brings more control to the female with reproduction. For internal fertilization to happen there needs to...

of mating. Many animals that live in water use external fertilization, whereas internal fertilization may have developed from a need to maintain gametes...

finishes with fertilization. Various exceptions to this sequence are possible, including artificial insemination, in vitro fertilization, external ejaculation...

evolved early in eukaryotes. The original form of sex was external fertilization. Internal fertilization, or sex as we know it, evolved later and became dominant...

(gámos) 'marriage') is a haploid cell that fuses with another haploid cell during fertilization in organisms that reproduce sexually. Gametes are an organism's reproductive...

amphibians exhibit external fertilization of eggs, typically within the water, though some amphibians such as caecilians have internal fertilization. All have...

parenthood project during in vitro fertilization and after discontinuation of unsuccessful in vitro fertilization". Fertility and Sterility. 92 (1): 149–156...

acting as an aggregation pheromone. It is likely that most externally fertilizing species (e.g. marine worms, sea urchins) coordinate their sexual behaviour...

indefinitely. Many animals that live in water use external fertilization, whereas internal fertilization may have developed from a need to maintain gametes...

structures within the worm show the capability of both internal and external fertilization. Fauchald, Kristian (2008). "Eulagisca gigantea Monro, 1939". WoRMS...

Aquatic arthropods may breed by external fertilization, as for example horseshoe crabs do, or by internal fertilization, where the ova remain in the female's...

animals for insemination and subsequent internal fertilization. Mating may also lead to external fertilization, as seen in amphibians, fishes and plants. For...

Fertilisation or fertilization (see spelling differences), also known as generative fertilisation, syngamy and impregnation, is the fusion of gametes...

Human reproduction is sexual reproduction that results in human fertilization to produce a human offspring. It typically involves sexual intercourse between...

guard the eggs and care for young. This behavior is owed to their external fertilization mechanism. During the mating process, the female frog produces a...

remain of one sex all their lives and rely on external fertilization. Some molluscs use internal fertilization and/or are hermaphrodites, functioning as both...

pellucida, which the sperm must penetrate to fertilize the egg. Once viewed simply as an impediment to fertilization, recent research indicates the zona pellucida...

lordosis reflex is uninhibited. The female is ready for copulation and fertilization. When a male mammal mounts the female, tactile stimuli on the flanks...

the species, spermatozoa can fertilize ova externally or internally. In external fertilization, the spermatozoa fertilize the ova directly, outside of...

where external fertilization is used, paternal care has been observed. This is critical to phylogeny, as most salamander families use external fertilization...

Spermatogenesis Oogenesis Gamete spermatozoon ovum Fertilization External fertilization Internal fertilization Sexual selection Plant reproduction Fungal reproduction...

through the female reproductive tract (internal fertilization) or through water (external fertilization) to reach the egg. Sperm motility can also be thought...

marine horseshoe crabs rely on external fertilization, air-breathing chelicerates use internal but usually indirect fertilization. Many species use elaborate...

ejaculation so that sperm can enter the female reproductive tract and fertilize the egg, thus beginning the next stage in human reproduction, pregnancy...

the sperm and fertilization can then begin. The female reproductive system functions to produce offspring. In the absence of fertilization, the ovum will...

nourish other organisms. Ocean iron fertilization is an example of a geoengineering technique. Iron fertilization attempts to encourage phytoplankton...

responsible for producing and transporting gametes, as well as facilitating fertilization and supporting the development and birth of offspring. Sex organs are...

are hermaphroditic, producing both eggs and sperm with which they can fertilize themselves, while rare individuals are male and have only one sex chromosome...

Spermatogenesis Oogenesis Gamete spermatozoon ovum Fertilization External fertilization Internal fertilization Sexual selection Plant reproduction Fungal reproduction...