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Does Fertilization Occur When Sperm Meets Egg?

Conception is the time when sperm travels up through the vagina, into the uterus, and fertilizes an egg found in the fallopian tube. Conception — and ultimately, pregnancy — can involve a surprisingly complicated series of steps. Everything must fall into place for a pregnancy to be carried to term.

What happens to the egg when one sperm gets inside?

Once it meets the egg, the nuclei from the egg and sperm merge and share their genetic material (1,7). If all this goes well, what fertilized egg becomes a zygote (1,7). The egg now contains all the genetic material it will need to become a person.

What happens when a sperm fertilizes an egg?

What happens when a sperm fertilizes an egg? If one sperm does make its way into the fallopian tube and burrows into the egg, it fertilizes the egg. The egg changes so that no other sperm can get in. At the instant of fertilization, your baby’s genes and sex are set.

How does a fertilized egg move back to the womb?

During fertilization, the sperm fuses with the egg, and then, causes a reaction that prevents other sperm from fertilizing the same egg. After fertilization, the embryo moves slowly back towards your womb where it finally attaches itself to the wall of the uterus and starts growing.

Can a fertilized egg be released after ovulation?

If you’ve been expecting a baby and had sexual intercourse during your fertile days, you can get pregnant. After ovulation, the egg released slowing migrates to the fallopian tube. At the fallopian tube, it waits and quickly fertilizes a sperm if already present.

How many sperm are needed to fertilize an egg?

Out of the approximately 200 sperm that reach the egg, only 1 enters the egg to fertilize it. The rest are pushed away by the zona reaction, which makes the fertilized egg impermeable to additional sperm. Those last extra sperm?

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