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Some females abort or resorb their own young while they are still in development after a new male takes over; this is known as the Bruce effect. [31] This may prevent their young from being killed after birth, saving the mother wasted time and energy. However, this strategy also benefits the new male.
One such occurrence is known as the Bruce Effect, in which female primates may abort the pregnancy when presented with a new male. This has been observed in wild geladas , where a majority of females abort pregnancies following the displacement of a dominant male. [ 28 ]
In many instances of nonparental infanticide in carnivores, the male of a species kills the young of a female to make her sexually receptive, e.g. brown bears. When one or two new male lions defeat and exile the previous males of a pride, the conqueror(s) will often kill any existing young cubs fathered by the losers. [3]
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The Bruce effect, or pregnancy block, [1] [2] is the tendency for female rodents to terminate their pregnancies following exposure to the scent of an unfamiliar male. [3] The effect was first noted in 1959 by Hilda M. Bruce, [4] and has primarily been studied in laboratory mice (Mus musculus). [1]
Plenty of celebrities — both those with and without children — have opened up about having abortions over the years. After the U.S. Supreme Court overturned Roe v. Wade in June 2022, tons of ...
Filial cannibalism occurs when an adult individual of a species consumes all or part of the young of its own species or immediate offspring.Filial cannibalism occurs in many species ranging from mammals to insects, and is especially prevalent in various types of fish species with males that engage in egg guardianship. [1]
The number of young adults who chose tubal ligation and vasectomies as birth control jumped abruptly after the Supreme Court overturned Roe v. Wade in 2022 and has continued to rise, new research ...