Women may experience breast tenderness before and after menstruation, or during ovulation. However, merely relying on breast tenderness to determine the likelihood of pregnancy during intercourse has no scientific basis. One should consider their menstrual cycle to see if it coincides with the ovulation period, which is typically about 14 days before the onset of the next menstrual cycle. The ovulation date, the five days before it, the four days after it, plus the day of ovulation itself, make up a total of ten days known as the ovulation period. Intercourse during this time is more likely to lead to pregnancy.