Scientists have created synthetic human embryos using stem cells, sidestepping the need for eggs or sperm. The model embryos resemble those in the earliest stages of human development, snd do not have a beating heart or the beginnings of a brain. Embryos may only be cultivated for up to 14 days in a lab.
The past 15 years have been tough on sperm cells. Research shows that men are running out of the little swimmers, and the number of men seeking infertility treatment has increased 7-fold while the quality of their sperm has plummeted. This could be more than a slight problem for humanity.
Diving into this issue more, lead researcher Dr. Ashley Tiegs and her colleagues analyzed sperm samples from fertility centers in the U.S. and Spain between 2002 and 2017.
She said:
Local food and seed systems must be rebuilt for Africans, write Mariam Mayet, Stephen Greenberg and Linzi Lewis. By Mariam Mayet, Stephen Greenberg and Linzi Lewis African Centre for Biodiversity in Johnnesburg Inter Press Service Africa is facing dire times.…Read more →
Male fertility is declining, and for years researchers have been trying to figure out why. The numbers may seem shocking, but between 60-80 million couples around the world are having a difficult time conceiving, and there is a likely culprit, especially considering evidence arising from the latest study published at Science Direct.
