Mice sperm produces offspring after being stored aboard the ISS. Although there were minor changes in the DNA, there is very little difference between the offspring from mice sperm from space and from Earth.
During the process of conception, more than 50 million sperm attempt to fertilize an egg. At least 10 of them reach the finish line, but only one will be successful. So do a sperm get to the winning badge?
A dose of the hormone kisspeptin could help men struggling with the sex lives by bringing back their lost sexual urges.
Older female orcas tend to put off their reproduction to give wat for younger females that were more likely to mate and reproduce.
The saying all is fair in love and war may not necessarily apply in the case of the Arctic char. A cold-water fish that populates alpine lakes, the Arctic char's sperm swims at different speeds in different fluids. Sperm speed is determined by whether the fish is submissive or dominant.
Japanese scientists succesfully grown healthy mouse pups using artificial egg cells.
No room for third party! These fish can outwit the "sneaky" male fish.
A new study showed that increasing acidity of seawater could alter sperm competition among marine animals.
A recent study reveals that inbreeding among Neanderthals have resulted to a harmful gene mutation, which was then passed on to modern humans, making them 40 percent less likely to reproduce.
Social mammals, including humans and mongooses, may compete in groups to produce larger offspring. A new study found that this, in addition to males' vying to pass along their genes by winning antler-fighting contests and the like, may be part of the evolutionary effort to increase the survival rate of one's own offspring.
Corals release their eggs and sperm based on photosynthetic cues provided by moonlight. However, when artificial light pollution interferes with natural light, corals fail to spawn. This could have serious impacts on threatened reefs.
For many species, including humans, sex is determined by sex chromosomes. However, this is not the case for ants, wasps and bees. A recent study sheds light on the evolution of sex determination in ants and how inbreeding can lead to sterile males.
A study of the porosity of ancient archosaur eggshells is tipping scientists off about the kinds of nests they once called home.
Howler monkeys are fairly small animals, but can roar as powerfully as tigers. This ability comes at a evolutionary trade-off, though: howler monkeys with louder calls often have smaller reproductive organs, a recent study revealed.