than 12 ounces of coffee (200 mg of caffeine -- that means green tea and soda, too!) a day. Keep in mind that some Starbucks 12-ounce cups of coffee contain 320 mg of caffeine. Jacuzzis: All that hot water can put sperm in, well, hot water. Testicles sit outside the body for a reason, to remain cooler. "Anything that increases body temperature can have a negative impact on sperm quality," Dr. Brasner says. When to see a doctor Doctors advise seeing a fertility specialist if: You're older than 39 and haven't conceived after three months You're 35 or older and haven't conceived after six months You're under 35 and haven't conceived after 12 months Also, if you have a history of fibroid tumors or bleeding between cycles, or if you've had trouble conceiving previously, get a physical exam before you start trying, Dr. Shamonki says. The good news: Following these tips, 85% of women find themselves starting a family after just one year. Women's Health: How Much Do You Know? As a woman, your health concerns are as unique as your body. How you take care of yourself has a huge impact on your future, affecting everything from your ability to have children to your risk of heart disease. There's no substitute for good health, and when it's gone, it's often gone for good. Don't let it pass you by. Test your smarts with this women's health quiz . Check out Health Bistro for more healthy food for thought. See