We may actually be one step closer to cracking the enigma of the female orgasm. Researchers have discovered that it may have to do with lady parts.

In specific, they found that the direct distance between the clitoris and vagina was 5-6 millmeters longer than average for those who have orgasm issues. Their clitorises were also smaller in size prompting scientists to posit if orgasm is affected by the size of anatomy. As Yahoo reports:
It is difficult to know whether it is the anatomy of the clitoris that influences orgasm, or having more orgasms changes the anatomy, Oakley said.

"We still can't tell whether this is the chicken or the egg," Oakley said. "Do these women have a bigger clitoris because they have more orgasms? Or are they born with a bigger clitoris that allows them to have better function?"
The study highlighted just how much sexual positions also played a role in pleasure and orgasm likelihood:
Women with orgasm problems tended to prefer the missionary position, whereas women with normal orgasm patterns favored being on top of their partner, in a position that provides more contact with the clitoris during the intercourse.

"These women, not only they have that closer distance between the clitoris and the vagina, but [also] they are using it to their advantage by taking the female dominant position," Oakley said.