There are many ways to calculate pregnancy time, one of the commonly used methods is to calculate the ovulation period. Ovulation refers to the time during a woman's menstrual cycle when eggs are released from the ovaries to the fallopian tubes, usually about 14 days before the next menstrual period.

If you want to calculate the time to pregnancy, it is recommended to consult a doctor or a professional fertility counselor. They can provide more detailed information and advice and help calculate the time to pregnancy.