Female only sperm

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Wednesday, January 23, 2019
All-female astronaut crews could reproduce in space without the help of accompanying men, new research suggests. The study found that frozen samples of sperm exposed to microgravity retained similar characteristics to sperm samples kept on the ground, raising hopes that a sperm bank could one day be set up in space to help populate new worlds. This could prove interesting for female astronauts, amid reports that future missions to Mars may involve women-only space crews. Helen Sharman, the first British astronaut, said at a conference in that there had been an unreleased Nasa report exploring sexual desires of space crew members during potential missions to Mars. But nothing has been reported on the possible effects of gravitational differences on frozen human gametes, in which state they could be transported from Earth to space.
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Mars colonisation possible through sperm bank in space, study suggests

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Sperm sorting method could prevent girls being born, scientists warn | New Scientist

By Michael Le Page. You could start to do it in your bedroom. However, Fazeli thinks it may not be necessary to select the fastest or slowest swimmers before insemination or IVF to influence the sex of an embryo. Seidel agrees. There is likely to be an appetite for such products, especially in countries where sex ratios have already been distorted in favour of boys. Several methods for sex determination already exist. This pre-implantation genetic diagnosis PGD method is almost per cent effective, but it is expensive.
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Female Flies Respond to Sensation of Sex, Not Just Sperm

The good news is that when our species eventually abandons this burned-out, used-up planet for a brave new world elsewhere in the universe, we can leave the men behind too. According to new research by scientists in Barcelona, frozen sperm can survive zero gravity conditions without deterioration, meaning that it will be far more economical to transport only women and sperm banks to populate our new intergalactic home, just as soon as we find a viable alternative planet. The idea of lost or distant worlds inhabited solely by communities of women who can procreate without men has been a staple of sci-fi and utopian fiction by women writers since the 19th century.
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A new chemical treatment that can segregate male and female sperm could one day mean parents going through IVF could choose whether they have a boy or girl. In experiments with mice sperm, scientists found they could produce litters that were 90 per cent male, according to the study published in Plos Biology. When the slower sperm were used, litters were 81 per cent female. The X chromosome has many genes while the shorter male Y chromosome has fewer, and this difference in gene expression meant scientists could distinguish between the two.
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Category: Interracial
Comments

(2)

Goltijar

Goltijar

8 months ago

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Gabar

Gabar

8 months ago

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