In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Lactation probably occurs for the first _ months after parturation.
[EX A]: two

[EX Q]: Most women experience a menstrual period _ to six weeks after a miscarriage.
[EX A]: four

[EX Q]: Pathologists study four to _ years after medical school and their postgraduate training.
[EX A]:
five