I'm finding it hard to get my sweetheart pregnant. My sperm is always thick and bubble.

Semen analysis. Your family doctor may be agreeable to give you a referral for a semen analysis, which should be around $ 100. He/she may also be willing to tell you that the results are O.K. without additional charge. If the results are abnormal, it depends on how dedicated the two of you are in your relationship to have a child whether or not you want to invest in fertility work up and treatment.