Final answer:
The question about Fred Haise's wife's pregnancy timing cannot be answered with the provided biological context. To determine how long before her due date the event called "blast off" was scheduled, historical information regarding Fred Haise's personal life would be required. Understanding the menstrual cycle and conception is important but does not specifically address the timing of Fred Haise's wife's due date.
Step-by-step explanation:
The original question pertains to the timing of Fred Haise's wife's pregnancy in relation to her due date, specifically regarding how far in advance of her due date her "blast off" was planned. However, the question is framed in a way that seems to reference a historical event related to Fred Haise, an astronaut. Based on the context provided, there are no biological details to answer the question about Fred Haise's wife's pregnancy timing. Instead, it would be necessary to look up historical accounts concerning Fred Haise's personal life to find this information. Therefore, without historical references, it's impossible to determine the correct option out of the four provided.
Still, understanding conception and the menstrual cycle is important in biology. Typically, conception is most likely to occur when sexual intercourse happens close to the time of ovulation, which for many women is around the 14th day of their menstrual cycle. However, since menstrual cycles can vary greatly in length and regularity, attempting to conceive on a specific day such as day 14 can be unsuccessful if the exact timing of ovulation is not known. This is because the variability means ovulation can occur at different times in the cycle.