Question
A woman inquired about the calculation of pregnancy time. She had her period on December 16th and met with her ex-boyfriend on December 20th before being with her current boyfriend. She wants to know if the child she is carrying could be from her ex-boyfriend.
Answer
Based on the provided menstrual date and sexual activity time, it can be estimated that the ovulation period was approximately around December 16th. Since sexual activity during the ovulation period may lead to pregnancy, and the average menstrual cycle is typically 14 days before the next period, the child cannot be from the ex-boyfriend.