Low testosterone has nothing to do with getting a woman pregnant. Low testosterone just means your body does not produce enough of the male hormone. Sperm is what has to do with getting a woman pregnant. If you had a low sperm count, then you would have possible issues getting a woman pregnant.
Not really. Though very low levels of testosterone can adversely affect sperm count and fertility, so have a word with your doctor. My husband had extremely low levels and was using Ageless Male for a while. His test levels are now up within an acceptable range. It has zero side effects, so if low testosterone is a concern for you, take a moment to go through Ageless Male reviews. http://doesitreallywork.org/ageless-male-review