Patient's question:
Patient Age: 25Detailed Condition and Purpose of Consultation:
I want to ask, is the "seven days before and eight days after" considered a very absolute safe period? Is it safe to take no precautions at all? My menstrual cycle is usually around 30 days, and it typically delays by about 2 days each month. For example, last month it arrived on the 6th, and it usually comes between the 6th and 9th of the next month. With this cycle, is the "seven days before and eight days after" absolutely safe?
Doctor's answer:
The safe period is commonly referred to as "the seven days before and the eight days after" in colloquial terms. The seven days before and the eight days after the menstrual period are considered safe, but this is just a general rule, indicating that generally speaking, the safe period before ovulation is seven days, and the safe period after ovulation is eight days. Many people have misunderstandings about this, including some who have used this method for a long time and a few doctors.Here's the accurate explanation:
1. The ovulation period usually occurs 14 days before the next menstrual period, not 14 days after the start of the current period.
2. For safety, the five days before the ovulation day, the four days after, and the ovulation day itself are all counted as the ovulation period, totaling 10 days.
3. Even the most risky approach requires avoiding the general survival time of sperm and egg cells, which is 72 hours. This means at least three days should be left on either side, which is referred to as the minimum reserved period of the safe period.