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How does a fertilized egg travel from a fallopian tube to the uterus?
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human reproductive system
Organs and structures of the male and female reproductive systems.
A fertilized egg travels from the fallopian tube to the uterus through a combination of two primary mechanisms: the rhythmic, swaying motions of cilia—fine, hairlike structures lining the tube's mucous membrane—and rhythmic muscular contractions, known as peristaltic waves, of the fallopian tube's wall.1
During this journey, which typically takes about three to four days, the developing egg is nourished by secretions from the tubal lining. As it moves toward the uterus, the fertilized egg undergoes cell division, evolving from a single-celled zygote into a solid, mulberry-like mass of cells called a morula. Upon reaching the uterine cavity, it eventually develops into a blastocyst before implanting into the uterine lining.123