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Domestic sheep reproduction. A cross-bred ewe suckles her lamb, which was the first of the 2008 spring lambing at a farm in Coventry, England. Domesticated sheep are herd animals that are bred for agricultural trade. A flock of sheep is mated by a single ram, which has either been chosen by a farmer or, in feral populations, has established ...
Homo sapiens × Pan troglodytes. The humanzee (sometimes chuman, manpanzee or chumanzee) is a hypothetical hybrid of chimpanzee and human, thus a form of human–animal hybrid. Serious attempts to create such a hybrid were made by Soviet biologist Ilya Ivanovich Ivanov in the 1920s, [1] and possibly by researchers in China in the 1960s, though ...
Interspecific pregnancy. Interspecific pregnancy (literally pregnancy between species, also called interspecies pregnancy or xenopregnancy) [1] is the pregnancy involving an embryo or fetus belonging to another species than the carrier. [1] Strictly, it excludes the situation where the fetus is a hybrid of the carrier and another species ...
Insemination is the introduction of sperm (semen) into a female or hermaphrodite's reproductive system in order to fertilize the ovum through sexual reproduction. [1][2] The sperm enters into the uterus of a mammal or the oviduct of an oviparous (egg-laying) animal. Female humans and other mammals are inseminated during sexual intercourse or ...
A human–animal hybrid and animal–human hybrid is an organism that incorporates elements from both humans and non-human animals. Technically, in a human–animal hybrid, each cell has both human and non-human genetic material. It is in contrast to an individual where some cells are human and some are derived from a different organism, called ...
Parthenogenesis (/ ˌpɑːrθɪnoʊˈdʒɛnɪsɪs, - θɪnə -/; [1][2] from the Greek παρθένος, parthénos, 'virgin' + γένεσις, génesis, 'creation' [3]) is a natural form of asexual reproduction in which the embryo develops directly from an egg without need for fertilization. In animals, parthenogenesis means development of an ...
The dorcas gazelle (Gazella dorcas), also known as the ariel gazelle, is a small and common gazelle.The dorcas gazelle stands about 55–65 cm (1.8–2.1 feet) at the shoulder, with a head and body length of 90–110 cm (3–3.5 feet) and a weight of 15–20 kg (33–44 pounds).
Superfetation. Superfetation (also spelled superfoetation – see fetus) is the simultaneous occurrence of more than one stage of developing offspring in the same animal. [1][2][3] In mammals, it manifests as the formation of an embryo from a subsequent menstrual cycle, while another embryo or fetus is already present in the uterus.