Healthy sperm morphology includes an oval head containing enzymes and proteins for egg fusion and delivery of genetic material, and a mid-region packed with mitochondria for motility and forward progression.

“And as we all know, they have a head. The head tends to be oval in most cases. The head contains very important enzymes and proteins that are designed to fuse with the much larger egg and to actually take the membrane of the sperm cell and combine to actually mesh with the egg cell's membrane and then deliver the genetic contents to the egg cell, in other words, to fertilize the egg cell. Now, just behind the head is a region called the mid region. That mid region is a slightly thickened region. And here, of course, I'm talking about healthy sperm cell morphology. Morphology simply means shape. A mid region-- that mid region has a bunch of things related to cell motility and to the forward progression of the cells. First of all, it is chock a block full of mitochondria.”