The switch that transforms sperm into super-swimmers in the race towards the egg has been identified at last. The discovery could lead to drugs that boost male fertility and new forms of male. Conception: From Egg to Embryo. Take a journey with us from the moment a single sperm fertilizes an egg. From tiny egg to growing embryo, follow the incredible process of conception.
Egg is fertilized in the Fallopian tube. It takes 3-4 days for the egg to get to the uterus. The fertilized egg (zygote) is called an embryo after it is implanted in the uterine lining. Jul 26, 2016 · So even when a good number of sperm do reach the fallopian tubes, half of them are left without an egg to fertilize. And when sperm do reach the fertile egg, the egg is Author: Meg Kehoe.