How to confirm the father of a child during pregnancy, and questions about pregnancy calculation

Inquiring about the possibility of the baby being related to an ex-boyfriend during pregnancy, and the calculation of the cesarean delivery due date.

A woman inquires if her pregnancy is related to her ex-boyfriend, providing relevant time points and medication information. The doctor responds that based on her description, the pregnancy is not related to the ex-boyfriend and explains how to calculate the due date.