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Most mammals are viviparous, giving birth to live young. [1] However, the five species of monotreme, the platypuses and the echidnas, lay eggs. The monotremes have a sex determination system different from that of most other mammals. [2] In particular, the sex chromosomes of a platypus are more like those of a chicken than those of a therian ...
Agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) investigate the birth of five babies in the town of Martinsburg, West Virginia, who were born with tails. The mother of the most recent baby, Amanda Nelligan, tells the agents that the father of her baby is Luke Skywalker. By researching the baby's chromosomes it is ...
Women are giving birth deep in the woods, hundreds of miles from the nearest hospital ... by choice. That's right -- no doctors, no epidural, not even a bed to lie on. It's a controversial new ...
For most species, the amount a fetus grows before birth determines the length of the gestation period. Smaller species normally have a shorter gestation period than larger animals. [ 2 ] For example, a cat's gestation normally takes 58–65 days while an elephant's takes nearly 2 years (21 months). [ 3 ]
"The more accurate representations we have for the process of birth, the more we can normalize and celebrate what the human body goes through to bring a baby into the world," Cohen says.
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A breech birth is when a baby is born bottom first instead of head first, as is normal. [1] Around 3–5% of pregnant women at term (37–40 weeks pregnant) have a breech baby. [ 2 ] Due to their higher than average rate of possible complications for the baby, breech births are generally considered higher risk. [ 3 ]
In the case of whales, dolphins and porpoises, the single calf is normally born tail first which minimizes the risk of drowning. [7] The mother encourages the newborn calf to rise to the surface of the water to breathe. [8] Large mammals which give birth to twins is much more rare, but it does occur occasionally even for mammals as large as ...