Literal question
Is this time just before her period begins, during her period, right after her period has ended, or halfway between two periods?
Interviewer instructions
In this section, information is collected about the births that a woman has had during her life, her current pregnancy status, and her knowledge of the monthly menstrual cycle. This is a particularly important section, and you need to be especially careful to obtain all the required information.
First, ask Q. 340 to see whether the woman thinks there are times during a woman's monthly cycle when she is more likely to become pregnant. If she says there is no time that is more likely than another or she does not know, record the response and skip to Q. 342. If she says there is a time when a woman is more likely to become pregnant, record YES and ask Q. 341. Make sure to read the entire question mentioning each of the four possible times before recording her response.