It's no secret that pregnancy changes the human body. When a woman carries a child, her body has to go through many adjustments to make sure she and the baby get through the next nine months (or thereabouts) safely.
With all the hormones coursing around a pregnant body, it's not surprising that there would be some changes. Another is that the voice can change. The rise in oestrogen and progesterone can cause swelling of the vocal folds, meaning some higher notes are lost and lower ones might appear.
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