During fertilization, the sperm undertake a long and perilous journey into thewoman'sbody. Their quest is to cross the cervix before they die. Out of millions of sperm, only one will fertilize the egg. Once that one sperm crosses the threshold, an entirely new journey begins. For the next...
Answer to: Polyspermy occurs when more than one sperm succeeds in fertilizing the oocyte. What does this mean for the zygote? How is polyspermy...
sperm count</p> g ing caloric intake // hours of sleep // exercise duration // exercise intensity // lactate threshold // steps taken in day // mood // medication taken // hours worked // cigarettes smoked</p> bthe power of self-tracking is even more profound. it's not just that...
Among the many reasons that we track population data, one is as important today as it was more than 1,000 years ago. What is that reason? Here's a hint -- the word census comes from the Latin word censere, which means "assess" [source: Bartleby]. As in, assess taxes. Contents ...