Caffeine consumption can affect fertility and may have implications when you are trying to get pregnant. While there is no universally agreed-upon safe limit for caffeine intake when trying to conceive, it is generally recommended to limit caffeine consumption. Here are some guidelines to consider:

1. Moderate Consumption: Many experts suggest that consuming less than 200 milligrams of caffeine per day is unlikely to have a significant impact on fertility or pregnancy. This is roughly equivalent to one 12-ounce cup of coffee.

2. High Caffeine Intake: High caffeine consumption, which is often defined as 300 milligrams or more per day, has been associated with a higher risk of fertility issues, miscarriages, and low birth weight in some studies.

3. Individual Variation: Keep in mind that individual responses to caffeine can vary. Some people may be more sensitive to caffeine than others, and even moderate caffeine intake might affect them differently.

4. Pregnancy: If you become pregnant, it's generally recommended to further reduce your caffeine intake. Some experts advise limiting caffeine intake to 200 milligrams per day or less during pregnancy to reduce the risk of miscarriage and potential complications.

It's important to note that caffeine is found not only in coffee but also in other sources like tea, soft drinks, energy drinks, and chocolate. You should consider your overall caffeine consumption from all sources when trying to limit your intake.