The 'minimal cell' has a total of 473 genes – less than any self-sustaining living organism known to humankind.
Research on human embryos is currently not open to federal funding in many countries, and many nations have prohibited it outright.
Sperm cells have fooled scientists for centuries: They don't 'swim', they move as their tails 'spin'
Sperm 'drills' into the fluid like a spinning top by rotating around itself whilst its tilted axis rotates around the centre.
Female deers that gave birth earlier increase their chances of reproductive success they also have more babies.
The study found that if people knew that using a condom prevents HIV, there are lesser cases in the district.
This technique was developed to help mothers who had failed multiple times to conceive through IVF.
Amazingly, the sperm resulted in birth rates comparable to semen frozen for 12 months.
Scientists have developed a new radar-like test that uses magnets to examine human sperm without killing or damaging them, an advance that may help improve the diagnosis of fertility problems.
Studies now indicate that hitherto relatively unaffected Indian states now have also got plunging child sex ratios.
Media sensationalism or bad defence? Purvi Patel's foeticide case sparks debate among Indian Americans
Recently, Purvi Patel, a 33-year-old Indian-American woman made history by becoming the woman in the US to be charged, convicted and sentenced for foeticide and child neglect.
A study by scientists from the universities of Manchester and Sheffield has found that many common lifestyle choices make little difference to male fertility.