What are my chances of getting pregnant at home?

When we think of conception through appropriately timed intercourse, we characterize “chances” based on a monthly rate. We call this “fecundability” (the chance of getting pregnant in a single month). Many patients are surprised to learn that human fecundability peaks at about 20% per month in a woman’s late 20s and decreases to about 5% per month by the age of 40. The length of time trying to conceive can also be informative as statistically, after a period of 2 years, fecundability drops to about 2% per month.