Getting kicked in the balls is usually done before the recipient can prepare, so that's +1 to balls. If done hard enough, the sheer speed of pain can put you into shock and kill you if you are not careful, so that's another +1. The sheer loss of pride of having to go down after being kicked is also a pretty big factor, so that's a +1. The pain goes away moderately fast, however, (couple of hours to a day) and doesn't usually call for the need of medical attention, so that's a -1. And you do wrack up respect points from your bros if you do get kicked in the balls, so that's another -1.
Ball-smashing goodness: 1
Getting pregnant and sustaining pregnancy can be emotionally and physically draining as well as painful, so that's a +1. After all is said and done, the hours (or days) of being in labor is also extremely painful (so I have heard), so that's a +1. There's a lot more medically that could go wrong during birth, which can result in a LOT of pain, so that's also a +1. It can also take very long to recover from a bad pregnancy, and if the woman gets a C-section, she could be in serious abdominal pain for a very long time, so that's a +1. Women also produce a MASSIVE amount of painkillers before labor, so that's a -1. Women also have a whole hell of a lot of time to prepare for pregnancy, whereas men do not have time to prepare for their ball/pride incapacitation, so that's a -1. Also, all of the bad effects I have mentioned are if the pregnancy goes awry, which doesn't happen as often as one would think, so that's a -1.
Baby-tearing fun: 1
My conclusion from a scientific analytical process (SHUTUP IT IS), is that getting kicked in the balls is exactly equal in every way, shape, and form to giving birth. Anyone who refutes this evidence needs to go out and have a beer, or possibly go to bed.