How an egg travel along the oviduct?

After ovulation, an egg is picked up by the fimbriae, finger-like projections at the end of the fallopian tube. Cilia, tiny hair-like structures lining the fallopian tube, help move the egg towards the uterus. Additionally, muscular contractions of the fallopian tube also propel the egg forward.

The passage of the egg through the fallopian tube takes approximately 3-4 days. During this journey, the egg may encounter sperm cells if ovulation and intercourse have occurred around the same time. Fertilization, the process where a sperm cell penetrates and fuses with the egg, usually occurs in the fallopian tube.

If fertilization happens, the fertilized egg, now called a zygote, continues its journey toward the uterus. The zygote undergoes cell division as it travels, becoming a blastocyst.

When the blastocyst reaches the uterus, it undergoes implantation, embedding itself into the uterine lining. Implantation typically occurs approximately 6-10 days after ovulation. Once implanted, the blastocyst will develop into an embryo and eventually a fetus.

In summary, after ovulation, the egg travels along the fallopian tube through the combined action of cilia and muscular contractions. The journey through the fallopian tube takes a few days, during which fertilization may occur, and if so, the developing embryo will travel to the uterus for implantation.