By Elie Dolgin. But, a few years ago, working in a lab at the University of Michigan, he witnessed something mind-boggling. The cells he was working with seemed to assemble themselves into what looked just like an early-stage human. A year before he published his results in , research by a team in Japan led to the birth of live mouse pups using eggs the team made from adult skin cells. Discoveries like these are bringing us closer to solving some of the most intractable problems in reproductive biology and medicine. By recreating these first days of development in the lab, researchers are breaking open the black box of early pregnancy, a poorly understood and fragile time at which most miscarriages happen and fertility treatments fail. Now 40 years after the birth of the first test-tube baby, the potential of these breakthroughs is heralding a new biological revolution, one that forces us to rethink what it means to reproduce and make a baby.
The male infertility crisis: ‘My failure at fatherhood ate away at my very being’
Semen acts as an anti-depressant | New Scientist
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Semen acts as an anti-depressant
Sperm function testing, once commonly performed for the infertile couple before employing assisted reproductive technology ART , has fallen out of favour in many reproductive medicine centers throughout the world. In large part, this reflects the current clinical practice of bypassing the in-depth evaluation of the male partner, while assuming that if a spermatozoon can be found for intracytoplasmic sperm injection ICSI , it must be a healthy cell capable of achieving fertilization. Nevertheless, sperm function testing can provide valuable clinical insights into defects causing male infertility.
By Raj Persaud. Semen makes you happy. The study, which is bound to provoke controversy, showed that the women who were directly exposed to semen were less depressed. The researchers think this is because mood-altering hormones in semen are absorbed through the vagina. They say they have ruled out other explanations.