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A pregnant Southern platyfish. Pregnancy has been traditionally defined as the period of time eggs are incubated in the body after the egg-sperm union. [1] Although the term often refers to placental mammals, it has also been used in the titles of many international, peer-reviewed, scientific articles on fish.
Calamity James, a British comic book character from The Beano; Calamity Jane, a 1953 film based on the person; Calamity Town, a 1942 novel by Ellery Queen; The Calamity, a central plot point for the 2011 video game Bastion; Calamity, a mod for the 2011 video game Terraria "Calamity", a song by Zayn from his 2021 album Nobody Is Listening
The Eater Of Worlds, a boss in Terraria. The Devourer of Gods, a boss in Terraria's Calamity Mod. The Crystal Worm Mother, a boss in Realm of the Mad God. The Lekgolo, a species of colonial worms which operate machinery as a hive, from the Halo franchise. The Ice Worm, a large hostile creature in Subnautica: Below Zero.
Male pregnancy is a common feature in the family Syngnathidae, which includes pipefish, seahorses, and sea dragons. [12] This type of polyandry has been demonstrated by analyzing the genetic composition of Gulf pipefish , Sygnathus scovelli and straightnose pipefish , Nerophis ophidion , which shows that males only mate once during their ...
Pregnancy usually occurs by sexual intercourse, but can also occur through assisted reproductive technology procedures. [6] A pregnancy may end in a live birth, a miscarriage, an induced abortion, or a stillbirth. Childbirth typically occurs around 40 weeks from the start of the last menstrual period (LMP), a span known as the gestational age.
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. [1] It is contrasted with internal fertilization, in which sperm are introduced via insemination and then combine with an egg inside the body of a female organism.
A mammal embryo (centre) is attached by its umbilical cord to a placenta (top), through which the mother provides food to the embryo while it is in her uterus.. Matrotrophy is a form of maternal care during organism development, associated with live birth (), in which the embryo of an animal or flowering plant is supplied with additional nutrition from the mother (e.g. through a placenta).
The eyes of Winteria telescopa differ slightly from those of other opisthoproctids by their more forward-pointing gaze.. Barreleyes, also known as spook fish (a name also applied to several species of chimaera), are small deep-sea argentiniform fish comprising the family Opisthoproctidae found in tropical-to-temperate waters of the Atlantic, Pacific, and Indian Oceans.