How do you tell if eggs are fertile?

Answer 1

I guess there are two answers to this question: one hi-tech answer and one low-tech answer.

The low-tech answer: A male is fertile when he can impregnate a female.

The high-tech answer: Conduct a semen analysis; combine findings for sperm count, motility, morphology, volume, sugar levels, pH, and so forth, and compare with normal levels. This is commonly done when a couple cannot conceive.

To answer your question in another way, human males become fertile by the process of puberty. There is no exact calendar date for when it starts and finishes, but the end product of puberty is normally a sexually mature, fertile person. On average, puberty sets in between 13-16 years of age, and can take anywhere from a few months to a few years to complete. I think it's usually done by the time you're 17 y.o., but for some it could be done as early as 10 y.o.

Answer 2

In order to tell if a chicken egg is fertile you need to crack it open into a bowl. Use a spoon to move around the yolk of the egg. Keep looking until you see a pale dot on the yolk. Look closely at it. If it is simply a dot, the egg is infertile. If it is a doughnut shape, it is fertile.

Answer 3

you can obsamen the egg and look for any little white lines this shows that on sertain places of the egg it is to thin this can course the egg to split or even have a living thing inside!

Answer 4

You could put the egg in the light to see.

Since the egg white is translucent, the yolk is not.

You could check if the egg is fertile without difficulty.