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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.
[20] [21] [22] GonaCon has been studied in male and female dogs and cats but does not provide long-acting suppression of fertility in these species. In dogs in particular, injection site reactions preclude use of the EPA approved formulation. [23] [24] Zona pellucida vaccines are targeted at females and do not suppress fertility in dogs or cats ...
In 2019, a Chinese woman was reported to have two babies from different fathers, one of whom was her husband and the other was a man having a secret affair with her during the same time. [12] In 2022, a 19-year-old Brazilian from Mineiros gave birth to twins from two different fathers with whom she had sex on the same day. [13]
A U.K. woman who was told she would never have children because of a rare condition recently gave birth to twins. When Hayley Haynes was 19, she went to the doctor because she hadn't gotten her ...
Neutering, from the Latin neuter ('of neither sex'), [1] is the removal of a non-human animal's reproductive organ, either all of it or a considerably large part.The male-specific term is castration, while spaying is usually reserved for female animals.
The first time Hannah Levine (who did not want to use her real name) tried having sex after giving birth, “the pain was immediate,” she says. Levine was taken by surprise. “No one warned me ...
The labor pain symptom is commonly known as sympathy pain. The source of Couvade syndrome is a matter of debate. Some believe it to be a psychosomatic condition, while others believe it may have biological causes relating to hormone changes. [2] The name derives from "couvade", a class of male pregnancy rituals.
An incompletely castrated male in livestock species (horse and cattle) is known as a rig. The term stag is used for a male animal castrated after the secondary sex characteristics have developed to such a point as to give him the appearance of sexual maturity. Rubber rings and pliers used in elastration