There are several synonyms that can be used in place of the term "conception chart". One alternative term that is commonly used is "fertility chart", which refers to a chart that tracks a woman's menstrual cycle and helps her determine the most fertile days for conception. Another synonym is "ovulation calendar", which is a tool that calculates the most fertile days based on a woman's menstrual cycle length. "Reproductive chart" is another term that can be used to refer to a chart that tracks fertility and conception. Additionally, the term "conception calendar" can also be used in place of "conception chart".