Scientists have found that female zebrafish can filter the semen of their mates to only allow the best sperm to fertilize their eggs.
Researchers turned male body cells into egg cells with two X chromosomes, which were then fertilized with another male mouse's sperm.
A Reddit post sharing an article in The Greek Reporter titled "Sperm Counts Drop by 62% Worldwide" has gone viral.
The stalk-eyed fly compensates for its lack of male-bearing sperm.
The anonymous 27-year-old man has suffered from coughing, a runny nose, sneezing and a hive-like rash every time he has orgasmed for the last 10 years.
The family is suing a Houston doctor and hospital, according to a personal injury lawyer.
A 16-year study has concluded U.S. sperm quality is decreasing, and environmental factors are one unconfirmed possibility.
The study involved 1,506 couples struggling to conceive.
Infertility is one of the most common problems for young people, affecting between 10 to 15 percent of couples.
The European Court of Human Rights said Dominique Petithory Lanzmann does not have legal standing to bring her late son's sperm to a fertility clinic in Israel so it can be implanted in eggs to make her grandchildren.
The research could change our understanding of the female anatomy.
"I felt dirty, almost as if I'd been raped," one victim said of the actions of Ottawa doctor Bernard Norman Barwin.
Monica and Yongmin Zhu from California raced against the clock to retrieve some of their son Peter's genetic material after he died.
The U.K. imports thousands of sperm samples from Europe each year, and a no-deal Brexit could see supplies could decrease quantities.
The Italian system does not offer artificial insemination to lesbian parents and registering a child may require the mother to lie that she had sex with a man.
Sperm was among the hundreds of things SpaceX sent to the International Space Station.
Sean Hannity has floated his latest conspiracy theory about the former president.
An important breakthrough meets a critical requirement for creating lab-grown sperm.
Why are Americans having less kids?
Stress can be hereditary, but new research suggests it doesn't have to be.
Low sperm count is also associated with health problems, including high risk of cancer and heart disease.