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Index of articles associated with the same name
in females that stores sperm for later use, the sperm sac. Milt, sperm sacs, large sacs containing large amounts of matured sperm. Epididymis, a part of
Sperm_sac
Largest species of toothed whale
species in the sperm whale superfamily Physeteroidea, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic
Sperm_whale
Fish seminal fluid and sacs
by spraying this fluid, which contains the sperm, onto roe (fish eggs). It can also refer to the sperm sacs or testes that contain the semen. Milt (sometimes
Milt
Male reproductive cell
Sperm (pl.: sperm or sperms) is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger,
Sperm
Species of whale
The dwarf sperm whale (Kogia sima) is a sperm whale that inhabits temperate and tropical oceans worldwide, in particular continental shelves and slopes
Dwarf_sperm_whale
Sac of skin that protects the testicles
"hide" or "skin") or scrotal sac is a part of the external male genitalia located at the base of the penis. It consists of a sac of skin containing the external
Scrotum
Cephalopod organ
structures consisting of ropes of sperm and in some species include an ejaculatory apparatus and a cement body. Needham's sac opens into the left side of the
Needham's_sac
Species of mammal
has a spermaceti organ in its forehead (see sperm whale for a discussion of its purpose). It also has a sac in its intestines that contains a dark red
Pygmy_sperm_whale
Complex fertilization mechanism of flowering plants
gametophyte or megagametophyte, also called the embryonic sac, with two male gametes (sperm). It begins when a pollen grain adheres to the stigmatic surface
Double_fertilization
Genus of squids
of a sperm sac into the female is done with the tentacles of a male. The female then lays the fertilized eggs in roughly twenty jelly-filled sacs, each
Loligo
Darts that some snails shoot into each other during mating
slugs create. Love darts are both formed and stored internally in a dart sac. These darts are made in sexually mature animals only, and are used as part
Love_dart
Parasitic or predatory annelid worms
leeches showed physiological changes after exposure, including longer sperm sacs and vaginal bulbs, and decreased epididymis weight. The caption below
Leech
Species of cephalopods
animals are face-to-face, then using a specialized tentacle to insert sperm sacs into an opening near the female's mouth.[clarification needed] The male
Pharaoh_cuttlefish
Part of the male reproductive system of many vertebrates
sperm, never urine. As in cartilaginous fish, the upper part of the duct forms the epididymis. In many species, the vas deferens ends in a small sac for
Vas_deferens
Pregnancy through in vivo fertilization
Artificial insemination is the deliberate introduction of sperm into the cervix or uterine cavity for the purpose of achieving pregnancy through in vivo
Artificial_insemination
Family of demersal cephalopod
tentacle to insert sperm sacs into an opening near the female's mouth. As males can also use their funnels to flush others' sperm out of the female's
Cuttlefish
Reproductive system of the human male
penis and the scrotum, which contains the testicles that produce semen and sperm, which, as part of sexual intercourse, fertilize an ovum in the female's
Male_reproductive_system
Order of arachnids
ready-made spermatophores (packages of sperm), but spin small sperm webs onto which they ejaculate and then transfer the sperm to special syringe-styled structures
Spider
Internal organ in the male reproductive system
which is the female gonad. Its primary functions are the production of sperm and the secretion of androgens, primarily testosterone. The release of testosterone
Testicle
Union of opposite-sex gametes in sexual reproduction to form a zygote
in the ovule wall) and the pollen tube "bursts" into the embryo sac, releasing sperm. The growth of the pollen tube has been believed to depend on chemical
Fertilisation
Protein-coding gene in the species Homo sapiens
Izumo sperm-egg fusion protein 1 (Sperm-specific protein izumo) is encoded in humans by the IZUMO1 gene. In mammalian fertilisation, IZUMO1 binds to its
Izumo sperm-egg fusion protein 1
Izumo_sperm-egg_fusion_protein_1
Process involved in the controlled movement of a sperm cell
Sperm motility describes the ability of sperm to move properly through the female reproductive tract (internal fertilization) or through water (external
Sperm_motility
In vitro fertilization procedure
Intracytoplasmic sperm injection (ICSI /ˈɪksi/ IK-see) is an in vitro fertilization (IVF) procedure in which a single sperm cell is injected directly into
Intracytoplasmic sperm injection
Intracytoplasmic_sperm_injection
Genus of roundworms
double rows of dorsal and ventral cuticular natatory bristles. In males, sperm sacs attached to the dorsal epidermis are the gonads, while females possess
Nectonema
spermatheca, which is also used for another structure; this organ digests sperm dart sac – bursa teloris; generates and holds the love dart diverticulum – diverticulum;
Reproductive system of gastropods
Reproductive_system_of_gastropods
Penultimate step in the activation of mammalian spermatozoa
Capacitation is a process sperm must undergo to prepare to fertilize an egg. This is a process that mature spermatozoa undergo after entering the oviduct
Capacitation
Production of sperm
transformed into spermatozoa (sperm) by the process of spermiogenesis. These develop into mature spermatozoa, also known as sperm cells. Thus, the primary
Spermatogenesis
Species of pseudoscorpion
males leave their sperm in sacs (spermatophores) in areas frequently visited by females. When a female sees a sperm sac, she intakes the sac into her gonopore
Tooth_Cave_pseudoscorpion
Genus of single-celled organisms
freundi. The type species is S. eclipidrili. This parasite infects the sperm sacs of oligochaete worms. The sporogonia contain numerous sporoblasts or spores
Spermatobium
Order of annelids
right and a left protrusible penis, into which both the nephridium and a sperm-sac open. The wide funnels of the nephridia of this region are possibly of
Haplodrili
Female plant reproductive structure
degenerate. The large central cell of the embryo sac contains two polar nuclei. The pollen tube releases two sperm nuclei into the ovule. In gymnosperms, fertilization
Ovule
Species of spider
upturned neck. Egg sacs range from 5/8" to 1" in diameter. The location of the egg sac varies. She sometimes suspends the egg sac near her web or places
Argiope_aurantia
Mass of fat found in all toothed whales
and composition from the spermaceti organ of the sperm whale. Sperm whales have two large oil-filled sacs, stacked one on top of the other: the dorsal spermaceti
Melon_(cetacean)
Development and formation of the human embryo
Fertilization occurs when the sperm cell successfully enters and fuses with an egg cell (ovum). The genetic material of the sperm and egg then combine to form
Human_embryonic_development
Deep-ocean dwelling squid in the family Architeuthidae
produces sperm that move into a complex system of glands that manufacture the spermatophores. These are stored in the elongate sac, or Needham's sac, that
Giant_squid
Genus of gastropods
with a short duct to the exogenous ( = originating from the outside) sperm sac and a characteristic penis. According to the World Register of Marine
Melanochlamys
Abnormal form of pregnancy (human disorder)
a single sperm (90% of the time) or two sperm (10% of the time) combining with an egg that has lost its DNA. In the former case, the sperm reduplicates
Molar_pregnancy
Haploid stage in the life cycle of plants and algae
called the embryo sac. A typical embryo sac contains seven cells and eight nuclei, one of which is the egg cell. Two nuclei fuse with a sperm nucleus to form
Gametophyte
Species of coral
have been maturing for about ten months and the sperm sacs for seven months. Male colonies liberate sperm into the water column in a spawning event synchronised
Rhytisma_fulvum
Surgical procedure for male sterilization
procedure, the vasa deferentia are cut and tied or sealed so as to prevent sperm from entering into the urethra and thereby prevent fertilization of ova
Vasectomy
Order of arachnids
sperm as they pass through the genital atrium, where spermatozoa are stored following mating, and uncoiled sperm cells can be detected in the egg sac
Amblypygi
Parvorder of cetaceans
porpoises, and all other whales with teeth, such as beaked whales and the sperm whales. 73 species of toothed whales are described. They are one of two
Toothed_whale
Family of mammals
(Kogia breviceps) and dwarf (K. sima) sperm whales. As their common names suggest, they somewhat resemble sperm whales, with squared heads and small lower
Kogiidae
Species of beetle
injecting his sperm into the ball of dung. From this, they drew parallels with their god Atum, who also begat children alone. Scarabaeus sacer was the species
Scarabaeus_sacer
Assisted reproductive technology procedure
fertilisation (IVF) is a process of fertilisation in which an egg is combined with sperm in vitro ("in glass"). The process involves monitoring and stimulating the
In_vitro_fertilisation
Female reproductive cell
female gamete is not capable of movement (non-motile). If the male gamete (sperm) is capable of movement, the type of sexual reproduction is also classified
Egg_cell
Soft-bodied eight-limbed order of molluscs
remove any spermatophore or sperm already present in the female. He picks up a spermatophore from his spermatophoric sac with the hectocotylus, inserts
Octopus
nucellus, and the female gametophyte is sometimes called the embryo sac or embryonic sac. Two distinct processes are involved in producing the megagametophyte
Embryonic_sac
Multicellular sex organs in plant life
are replaced by the embryo sac inside the ovule. The male gametangia are most commonly called antheridia. They produce sperm cells that they release for
Gametangium
External body part of a spider
cylindrical gland spots, are found only in females and used for making egg sacs. The desert grass spider, Agelenopsis aperta, has especially prominent spinnerets
Spinneret
Biological process
gamete is produced inside the embryo sac of the ovule. In angiosperms, the division of a generative cell into two sperm nuclei results in the production of
Gametogenesis
Form of reproduction where fertilization occurs outside of the female's body
organism's sperm fertilizes a female organism's egg outside of the female's body. It is contrasted with internal fertilization, in which sperm are introduced
External_fertilization
Ways different insect species reproduce
have a pair of testes, inside of which are sperm tubes or follicles that are enclosed within a membranous sac. The follicles connect to the vas deferens
Insect_reproductive_system
Mode of natural selection
include sperm competition and cryptic female choice. Sperm competition involves male gametes trying to fertilize eggs first. As a result of sperm competition
Sexual_selection_in_mammals
Medical condition
epididymis. The fluid is usually a clear or milky white color and may contain sperm. Spermatoceles are typically filled with spermatozoa and they can vary in
Spermatocele
Grains containing the male gametophytes of seed plants
grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects
Pollen
Clade of spiders
the female's abdomen. One or more males inject sperm from their palpal bulbs via this opening; the sperm is usually stored in special spermathecae (absent
Entelegynae
Sounds produced by whales
Sperm Whales: Social Evolution in the Ocean. Chicago: University of Chicago Press. pp. 135–141. ISBN 978-0-226-89518-5. Hal Whitehead (2024). "Sperm whale
Whale_vocalization
Eggs and sperm released into water
eggs and sperm released or deposited into water by aquatic animals. As a verb, to spawn refers to the process of freely releasing eggs and sperm into a
Spawning
Superorder of cephalopod molluscs
other fish, sea birds, seals and cetaceans, particularly the specialized sperm whales. Squid can change colour for camouflage and signalling. Some species
Squid
Marine animals, subphylum of chordates
being fertilised by sperm from another individual. The gonozooid is viviparous, and at first, the developing embryo feeds on its yolk sac before being released
Tunicate
Species of arachnid (type of jumping spider)
oviposition, spiderlings hatch within the egg-sac. After hatching, they complete their first molt within the egg-sac and do not emerge for another 10–14 days
Phidippus_audax
Type of sperm production impairment
cells contribute to the formation of the blood-testis barrier and aid in sperm generation. These cells respond to follicle-stimulating hormone, which is
Sertoli_cell-only_syndrome
Reproductive physiology of fishes
puberty into old age, develop into sperm cells (also known as spermatozoa or male gametes). The developing sperm travel through the seminiferous tubules
Fish_reproduction
Mating practice in invertebrates
abdomen with his aedeagus and injects his sperm through the wound into her abdominal cavity (hemocoel). The sperm diffuses through the female's hemolymph
Traumatic_insemination
Chemical compound
selective inhibitor of soluble adenylyl cyclase (sAC). In animal studies it reversibly inhibits sperm motility, producing temporary infertility without
TDI-11861
Class of parasitic flatworms
the ventral sucker. Spermatogenesis produces biflagellate sperm (sperm with two tails). Sperm is stored in the seminal vesicles, which are connected to
Trematoda
Species of spider
other members of the Pisauridae, P. mira carries its eggs along with it in a sac that is secured both by a thread of silk linking it to the spider's spinnerets
Pisaurina_mira
Tissue inside seeds that is starchy in cereals and liquid in coconuts
the two sperm nuclei inside a pollen grain reach the interior of a female gametophyte or megagametophyte, also called the embryonic sac. One sperm nucleus
Endosperm
Procreative biological processes of humanity
sexually mature and fertile male and female. During sexual intercourse, sperm cells are ejaculated into the vagina through the penis, resulting in fertilization
Human_reproduction
Species of rodent
possess a sac known as the cauda epididymis, which stores sperm and lies underneath the scrotal protrusion. Temperature regulation ensures maximum sperm output
Wood_mouse
Protein-coding gene in humans
nasopharynx tendon of biceps brachii testicle endothelial cell trabecular bone sperm Top expressed in tail of embryo genital tubercle epiblast primitive streak
HEATR1
Species of beetle
female being three times in 35 days. Aspects of sperm competition such as sperm displacement and sperm precedence have been observed in the species. In
Onymacris_unguicularis
Primary sexual organ of male animals
has no major function other than intromission, or at least conveying the sperm to the female, but in the placental mammals, the penis bears the distal
Penis
Species of spider
some time. Males exhibit competition for female mates both by fighting and sperm competition. Uniquely, these spiders exhibit behavioral thermoregulation
Bowl_and_doily_spider
Young male human
sex of the zygote is determined by whether the sperm cell contains an X or Y chromosome. If the sperm cell contains an X chromosome, the fetus will be
Boy
Millipede anatomical structure
known as vulvae, are paired sacs in female millipedes that located on the underside of the third body segment that store sperm and connect to the oviduct
Cyphopod
Terrestrial invertebrate, order Opisthopora
are internal sacs that receive and store sperm from the other worm during copulation. As a result, segment 15 of one worm exudes sperm into segments
Earthworm
Large spore in heterosporous plants that germinates into a female gametophyte
a female gametophyte, which produces egg cells. These are fertilized by sperm produced by the male gametophyte developing from the microspore. Heterosporous
Megaspore
Species of spider
This species exhibits a high first-male sperm precedence, so providing a virgin female with a large sperm quantity is advantageous. Because there is
Misumena_vatia
Species of fish
extended rod-shaped anal fin that acts as an intromittent organ to introduce sperm into the female during mating. The species is endemic to Mexico where it
Poeciliopsis_prolifica
Species of shark
pup is a yolk sac which provides nutrients for them as they develop, which they absorb as they grow. Even after fully absorbing the yolk sac, the pups may
Spiny_dogfish
Method for early detection of pregnancy
frog's dorsal lymph sac. The gonadotropic hormone in the urine of pregnant women, after injection, would lead to the release of sperms from the frogs. This
Pregnancy_tests_using_animals
Genus of cephalopods
lack a hectocotylus for the transfer of sperm packets. The Grimpoteuthis male uses its large suckers to pass sperm packets, each within an operculum, directly
Grimpoteuthis
Process of bearing offspring
until it is fully dilated at 10 cm diameter. At some time, the amniotic sac bursts and the amniotic fluid escapes (also known as rupture of membranes
Birth
Biological system where sex is determined by the number of sets of chromosomes
sperm in an internal sac called the spermatheca. The mated female controls the release of stored sperm from within the organ: If she releases sperm as
Haplodiploidy
Species of spider
arachnids that usually display sexual cannibalism while mating. After mating, sperm is stored in the spermathecae, organs of the female reproductive tract,
Redback_spider
Cephalopod sex organ
knew of its use in mating, he was doubtful that a tentacle could deliver sperm. The name hectocotylus was devised by Georges Cuvier, who first found one
Hectocotylus
Process by which animal embryos form and develop
Embryonic development starts with the fertilization of an egg cell (ovum) by a sperm cell (spermatozoon). Once fertilized, the ovum becomes a single diploid
Animal_embryonic_development
One of two forms found in the phylum Cnidaria (zoology)
individual can contain both male and female individuals (ramets). When eggs and sperm (gametes) are formed, they can produce zygotes derived from "selfing" (within
Polyp_(zoology)
Protein-coding gene in humans
bp RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in sperm oocyte secondary oocyte right testis left testis trabecular bone ventricular
Centromere_protein_U
Species of shark
catshark is able to store sperm and lay eggs several days after initial copulation. The shark has been known to store sperm up to 843 days although, there
Chain_catshark
Male parent
male releases sperm into the pouch, fertilizing the eggs. The embryos develop within the male's pouch, nourished by their individual yolk sacs. Male catfish
Father
Enzyme found in humans
bp RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in sperm cerebellar hemisphere right hemisphere of cerebellum rectum tendon of biceps
Dehydrodolichyl diphosphate synthase
Dehydrodolichyl_diphosphate_synthase
Methods to achieve pregnancy by artificial or partially artificial means
involves procedures such as in vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI), and cryopreservation of gametes and embryos, and the use
Assisted reproductive technology
Assisted_reproductive_technology
Term in evolutionary biology
female's egg. Sperm competition selects for both offensive and defensive traits. Offensive sperm competition consists of males displacing sperm from the previous
Sexual_conflict
Regulatory cytosolic enzyme
Soluble adenylyl cyclase (sAC) is a regulatory cytosolic enzyme present in almost every cell. sAC is a source of cyclic adenosine 3',5' monophosphate
Soluble_adenylyl_cyclase
haploid embryonic stem cells, which would allow for the development of female sperm and male eggs. In 2004, by altering the function of a few genes involved
Use of assisted reproductive technology by LGBTQ people
Use_of_assisted_reproductive_technology_by_LGBTQ_people
Non-consensual fertility treatments
doctor to obtain consent from a patient before inseminating her with his own sperm. This normally occurs in the context of people using assisted reproductive
Fertility_fraud
Cell cycle checkpoint
as the metaphase-to-anaphase transition, the spindle assembly checkpoint (SAC), the metaphase checkpoint, or the mitotic checkpoint, is a cell cycle checkpoint
Spindle_checkpoint
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