Nine practical strategies for boosting fertility and supporting a healthy pregnancy. You’ve been trying to start a family without success for the past year or more, you’re not alone. As many as one in 10 Americans will experience infertility, according to RESOLVE, a national infertility association. While the causes are not completely understood, research suggests contributing factors may include poor nutrition, environmental agents and stress — symptoms common to other health issues. The fact that many women are waiting longer to start families also plays a role.