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A similar effect is a "voice crack", during which a person's voice suddenly and unintentionally enters a higher register (usually falsetto) for a brief period of time. This may be caused by singing or talking at a pitch outside the person's natural vocal range , stress, fatigue, emotional tension, or the physical changes associated with puberty.
Funic souffle (also known as funicular or fetal souffle), is a blowing sound heard in synch with fetal heart sounds, and may originate from the umbilical cord. It has also been described as a sharp, whistling sound that is synchronous with the pulse of the foetus, usually heard during the second trimester of pregnancy (13–28 weeks). [3]
There are many physiologic changes that occur during pregnancy that influence respiratory status and function. Progesterone has noticeable effects on respiratory physiology, increasing minute volume (the amount of air breathed in and out of the lungs in 1 minute) by 40% in the first trimester via an increase in tidal volume alone, as the ...
Signs and symptoms of pregnancy are common, benign conditions that result from the changes to the body that occur during pregnancy. Signs and symptoms of pregnancy typically change as pregnancy progresses, although several symptoms may be present throughout. Depending on severity, common symptoms in pregnancy can develop into complications ...
The amygadala, prefrontal cortex and hypothalamus begin to change during pregnancy due to the high levels of stress experienced by the mother during this time. [ 35 ] In human mothers there was a correlation between increased gray matter volume in the substantia nigra and positive emotional feelings towards the infant.
Prenatal perception is the study of the extent of somatosensory and other types of perception during pregnancy.In practical terms, this means the study of fetuses; none of the accepted indicators of perception are present in embryos.
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In pregnancy terms, quickening is the moment in pregnancy when the pregnant woman starts to feel the fetus's movement in the uterus. [1] It was believed that the quickening marked the moment that a soul entered the fetus, termed ensoulment. [2]
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