It's a commonly held belief: Sperm cells are like runners in an epic race, competing against each other for access to the coveted egg at the finish line. The egg, in turn, waits patiently for the ...

Once a sperm has broken through to an egg cell in order to fertilize it, the two cells need to hold together tightly. This occurs via a type of protein binding that is among the strongest in ...

Did you know that millions of sperm race toward the egg during ovulation, yet only one completes the journey? Many patients and couples trying to conceive worry about what truly happens at this moment ...