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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.
Nephila sp. eating a conspecific. Females exercise mate choice, rejecting unwanted and unfit males by cannibalizing them. [25] Mate choice often correlates size with fitness level; smaller males tend to display a low level of fitness; smaller males are therefore eaten more often because of their undesirable traits. [25]
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]
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. [ 29 ]
This is who is affected by abortion legislation.
Possibly the most well known of them is about two women who made a survival pact during a siege of Samaria: "first they will kill and eat one woman's son, then the other's". After the first child had been eaten, however, the second mother hid her own son, prompting the first woman to appeal to the king that he make the other woman keep her part ...
Young women may have felt a greater urgency to act than their male partners in the wake of policy changes because pregnancy disproportionately affects them, said Dr. Angela Liang, a clinical ...
Some animals starve to death shortly after birthing their young while others are eaten by their own young -- but these mothers make the ultimate sacrifice. Click through for 10 animal mothers that ...