reproduction
Sperm Grown On Mice Produce Live Monkeys
Six healthy monkeys have been born using sperm grown from testis tissue transplanted onto the backs of mice.
Why Human Eggs Don’t Age Well
Defective chromosome separation in the egg cells of older women can cause miscarriage and congenital diseases, scientists say.
Superovulation And The Mass Production Of Knockout Mice
Researchers have succeeded in stimulating a single female mouse to produce more than 100 eggs in one round of harvesting.
To Be A Sperm Or An Egg?
Female fish without the foxl3 gene produce fully functional sperm instead of eggs in their ovaries.
Keeping Mammalian Sperm Production Flowing
The maintainance of stem cells during mouse spermatogenesis depends on hierarchical differences in response to retinoic acid, study says.
Cell Fusion Ensures Only One Sperm Gets Through
Research shows that flowering plants prevent polytubey through the extremely rare process of cell fusion.
Evolution Puts Checks On Virgin Births
Even in species that are able to reproduce clonally, sexual stimulation appears to be required for optimal fertility.
Female Sea Urchins Hedge Their Bets In Mating Game
Female sea urchins that have many mates also have higher offspring survival rates.
Giant Sperm Preserved By Bat Poo
Scientists have discovered tiny shrimp which have giant sperm thought to be longer than the male's entire body.
