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...

is an aspect of mating. Many aquatic animals use external fertilization, whereas internal fertilization may have developed from a need to maintain gametes...

sexes and mating types. The original form of sex was external fertilization. Internal fertilization, or sex as we know it, evolved later and became dominant...

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

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

(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...

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

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...

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

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

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

reproduce sexually with external fertilization, including many basal vertebrates. Vertebrates reproduce with internal fertilization through cloacal copulation...

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

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

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...

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

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

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...

suborder with external fertilization. This is critical to phylogeny, as Salamandroidea, the third suborder, use internal fertilization which may be pair...

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

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

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

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

zygote. If no fertilization occurs, menstruation is the process by which the uterine lining is shed as blood, mucus, and tissue. Fertilization usually occurs...

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

oocyte leaves the ovary and matures rapidly into an egg ready for fertilization. Fertilization will cause the egg to complete meiosis II. In human females there...

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

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