Determining the time of ovulation is a complicated process which depends on many factors.

If the question is asking whether it is true or false, the answer is true. It is because not all women who have menstruation has the exact time when it comes to predicting or determine ovulation as there are factors considered and interrupts with these process that made it complicated and hard to determine.

Ibelieve its b but u might have to

Giga is the second highest prefix on the normal scale, the first is terra.