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The etymology of the term "freemartin" is uncertain: speculations include that "free" may indicate "willing" (referring to the freemartin's willingness to work) or "exempt from reproduction" (referring to its sterility, or to a farmer's decision to not bother trying to breed a freemartin, or both), or that it may be derived from a Flemish word for a cow which gives no milk and/or has ceased to ...
The length of pseudopregnancy varies greatly with the mean duration being 41 days. After pseudopregnancy, the female cat returns to proestrus and can become pregnant again. The pseudopregnancy lasts around half the length of a normal pregnancy in cats. This is advantageous to cats as they can conceive earlier making them more efficient in ...
Examination, ultrasound, and pregnancy tests can be used to rule out false pregnancy. [1] False pregnancy has a prominent psychiatric component as well as physical manifestations of pregnancy. [2] It can be caused by trauma (either physical or mental), a chemical imbalance of hormones, [2] [3] and some medical conditions. [1]
There have been both successful and unsuccessful examples of interspecific pregnancy in a multitude of different animals: “alpaca and lama (Godke 2001), cow (Bos taurus) and zebu (Bos indicus; Summers et al. 1983), banteng (Bos javanicus) and cow (Bos taurus; Solti et al. 2000), horse, donkey, Przewalski’s horse and Grant’s zebra (Summers ...
A mooncalf (or moon-calf) is a monstrous birth, the abortive fetus of a cow or other farm animal.The term was occasionally applied to an abortive human fetus.. The term derives from the once widespread superstition, present in many European folk traditions, that such malformed creatures were the product of the sinister influence of the Moon on fetal development.
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Bovine prolapsed vagina can occur when the cow is near calving, in the late phases of cow's pregnancy (usually last trimester). [1] Sometimes cow's cervix prolapses along its vagina, [5] and such condition is known as the bovine cervico-vaginal prolapse. [3] [6] It can happen that cow's urinary bladder gets contained within the prolapsed vagina ...
The Sayaguesa is one of the largest indigenous Spanish cattle breeds. It displays considerable sexual dimorphism: bulls may weigh up to 1100 kg and cows up to 700 kg. [3]: 148 The height at the withers averages 158 cm for bulls and 154 cm for cows. [9] The coat is black, sometimes lighter on the underparts.