In biology context, contractions refer to rhythmic tightening and relaxing of uterine muscles during childbirth which help push baby out through birth canal.
Imagine contractions as ocean waves. They start off small (gentle tightening), build up (intense tightening), then recede (relaxation). This cycle repeats until delivery is achieved - just like waves keep coming until high tide is reached!
Uterus: The organ in women where offspring are conceived and gestate before birth; also known as womb.
Cervix dilation: The process during labor when cervix opens up to allow passage for baby's birth.
Braxton Hicks Contractions: These are 'practice' contractions that sometimes start weeks before actual labor.
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