sperm造句怎么写

While sperm count is an issue in 89 percent of male infertility cases, other causes of infertility, such as sperm speed, motility and shape, cannot be measured by the test.

This gastropod (from the Hydatinidae family) was recently discovered living on a sperm whale carcass in the deep sea near Kagoshima in southern Japan.

Mammalian fertilization consists of an intricate cascade of cell-cell interactions that culminate in the fusion of sperm and egg membranes and formation of a zygote.

Although the egg and sperm each supply half the DNA for the new baby, the egg provides all the cellular support systems, including enzymes and proteins.

A diet rich in saturated fats, such like Fried bacon, sausages, butter and cream - could cut the sperm count by almost half, found researchers at Harvard Medical School in the us.

On this butterfly egg, the lacy pattern marks the micropyle, where sperm enters. A similar design appears on the scaly wings that gave the red lacewing butterfly its name.

The male sperm fertilizes the female egg.

an animal oil found in the blubber of the sperm whale.

For example, male infertility can be caused by impaired sperm production, function or delivery.

It is the same in unrelated fertile men, but it is different in the sperm of infertile men.

After allowing the virus to infect the eggs, the team fertilized them with normal cat sperm and injected them into the fallopian tubes of 22 female cats.

Several days later, Harrington filed again, this time invoking a 1994 Kansas statute stating that a man who donates sperm is not viewed as the legal father unless it’s agreed to in writing.

Long believed to exist only in the brains of humans and other great apes, in 2006 spindle cells were discovered in the same brain areas in humpback whales, fin whales, killer whales, and sperm whales.

Jelly fish reproduce by release egg and sperm into the sea.

We knew what the Earth looked like from outer space before we knew what the sperm whale looked like underwater.

If the egg is fertilized by a sperm cell, it stays in the uterus and grows into a baby, using that extra blood and tissue to keep it healthy and protected as it's developing.

The sperm whale is believed to dive deeper than any other cetacean .

Causes of infertility are numerous, ranging from hormonal imbalances, to defects of the uterus, to misshapen sperm, low sperm count or low sperm motility in men.

Understanding the details of how sperm and egg cells grow will help scientists develop treatments for people who are left infertile when the process goes wrong.