A fertilized egg, a zygote, stays as a single cell for about a half an hour before its first division.
as soon as the sperm fertilizes the egg
As soon as the egg sac has gone.
Technically, an unfertilized egg is not alive. Since this question is in regard to chickens...the egg itself will develop normally and will be laid by the hen. The unfertilized egg will begin to rot during incubation whereas a fertilized egg will start to develop into a chick.
As soon as they can afford Two Men & a Truck.
When an egg is being formed, it starts out as a follicle. There are many follicles in the ovaries, with only a few that actually develop into eggs.
Normally, you do not ovulate (release an egg) when you're taking the birth control pill.
It is possible that the semen will find an egg and fertilize. This will make the female pregnant because that fertilized egg will start developing into a baby over a period of nine months.
When they are pregnant it is in the egg. When someone is a lesbian they do not start making sperm, they are still a woman.
They start our as a tiny egg, among millions. Then they brake out of this egg, as they have formed into something named larvae. this larvae grows bigger and starts to develop more recognisable features like fins, and a tail.
In some cases the sperm just dies before meeting the egg.
It can happen as soon as the egg is fertilized or attached and you will never know you were pregnant. The most common is in the first trimester.
No, it's impossible. The genetic make-up of the sperm and egg are too different and they won't fuse and develop