Level 1: What is the safety period? The safe period refers to a period of time before and after ovulation in a woman’s menstrual cycle, during which sexual intercourse is less likely to lead to pregnancy. Generally speaking, the period from 5 days before ovulation to 4 days after ovulation is the period when it is easier to get pregnant, while the time outside of this period is considered to be a relatively safe period. Level 2: Is the safety period really reliable? Although the safe period theory