Science, Space and Technology News 2023
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But earlier research also showed that rats who have given birth by Caesarean section, and virgin mice exposed to pregnancy hormones, still display this maternal behaviour, suggesting that hormone changes already during pregnancy may be more important.In the current study, the researchers found that female mice indeed showed increased parental behavior during late pregnancy, and that exposure to pups wasn’t necessary for this change in behavior.
Making these neurons insensitive to hormones completely removed the onset of parental behavior during pregnancy. Mice failed to show parental behavior even after giving birth, suggesting there is a critical period during pregnancy when these hormones take effect.
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