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The presence of a parent significantly reduces the rate of infanticide because conspecific adults ignore juveniles when a parent is present, likely because another adult is more threatening to the aggressive lizard. Therefore, a juvenile living within its parents' own territory will experience far less attacks from conspecific adults. [42] [43]
For example, in baboons at Amboseli, rates of fetal loss increase following the immigration of aggressive males. [30] In some social systems, lower-ranking primate females may delay reproduction to avoid infanticide by dominant females, as seen in common marmosets. In one instance, the dominant marmoset female killed the offspring of a ...
Female and male gerbils were put into one of four housing conditions (parents only, parents and siblings, siblings, and unrelated). Again, a pup test was conducted (same as previous study above), with each male and female to observe responses to an unfamiliar pup in the cage, while progesterone was measured via blood sample following the test.
A boa constrictor in the U.K. gave birth to 14 babies — without a mate. The process is called parthenogenesis, from the Greek words for “virgin” and “birth.” It tends to occur in ...
Infanticide is the killing of a neonate after birth. In zoology, this commonly refers to the killing and in some cases consumption of newborn animals by either a parent or an unrelated adult of the species.
Countries that allow abortion if the mother is at risk but do not allow abortion if the fetus has a genetic defect include Iran, Ireland, Mexico, and the Dominican Republic. [ 10 ] Not all genetic markers which can be checked are for disease, leaving open the possibility that parents may choose an abortion based on personal preference rather ...
Twice in the past week alone, former President Donald Trump has pushed his often-repeated falsehood that some U.S. states, in their zeal to protect abortion rights, allow for the killing of babies ...
Studies and reports that discuss sex-selective abortion are based on the assumption that birth sex ratio—the overall ratio of boys and girls at birth for a regional population, is an indicator of sex-selective abortion. [8] [15] The natural human sex ratio at birth was estimated, in a 2002 study, to be close to 106 boys to 100 girls. [16]