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The most common form of sterilization in dogs and cats is surgical, spaying in females and castration in males. Non-surgical fertility control can either result in sterilization or temporary contraception and could offer a cheaper way to keep wild dog and cat populations under control. As of 2019, only contraceptives are commercially available.
Heteropaternal superfecundation is common in animals such as cats and dogs. Stray dogs can produce litters in which every puppy has a different sire. Though rare in humans, cases have been documented. In one study on humans, the frequency was 2.4% among dizygotic twins whose parents had been involved in paternity suits. [6]
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.
Related: Dog and Mama Cat Have 'Joint Custody' of Kittens After Working Out Their Differences "That Momma knew her kittens would be super safe with him standing guard!" noticed commenter @angcat74.
A struggling couple in Shenzhen, China, got slammed online after asking for donations to pay for medical bills after giving birth to quadruplets.The parents already had two daughters, making their ...
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Interspecies compatibility is related to the type of placentation, as mothers of species having the more invasive hemochorial placentation (such as humans) must create a stronger downregulation of maternal immune responses, and are thereby more receptive to fetuses of other species, compared to those with endotheliochorial (e.g. cats and dogs ...
A Guide Dogs mother has given birth to a litter of nine puppies just in time for Christmas. The four-year-old golden retriever named Puds, a breeding dog for the charity, gave birth to five girls ...