Post Date November, 16 2024
The birth of new life begins with the combination of sperm and eggs. In order to achieve contraceptive effects, it is necessary to find ways to prevent encounters. The strategy adopted for safe period contraception is to calculate the appearance time of the egg and the possible fertilization time, so that the sperm can avoid these times and move again.
When is the safety period
From the perspective of contraception, a woman's menstrual cycle can be divided into menstrual period, ovulation period, and safe period. Generally speaking, the ovaries of women of normal reproductive age only produce one egg per month. After ovulation, the egg can survive for 1-2 days, while sperm can survive for 2-3 days in the female reproductive tract. The fertilization ability is mostly within 24 hours after ovulation, and after 2-3 days, sperm loses the ability to bind to the egg. Therefore, sexual intercourse 2-3 days before ovulation and 1-2 days after ovulation has the possibility of pregnancy, which is referred to as a period of easy pregnancy and danger. The ovulation period of women is generally around 14 days before the onset of the second menstrual cycle.
For insurance purposes, a total of 10 consecutive days of ovulation, including the first 5 days and the last 4 days, are referred to as ovulation days, while the remaining time outside the physiological cycle is referred to as the safe period. The safety period is divided into pre ovulation safety period and post ovulation safety period. The safe period before ovulation is from the day when menstruation is clean to the day before ovulation. The safe period after ovulation is from the first day after the end of the ovulation period to the day before the next menstrual cycle.
A few days before and after is the safety period
The safe period refers to the period from the end of the last ovulation period to the next ovulation period. Generally speaking, if a woman's normal physiological cycle is 28 days, the first day of menstruation is a safe period of 7 and 8 days. The safety period is divided into pre ovulation safety period and post ovulation safety period. The safe period before ovulation is from the day when menstruation is clean to the day before ovulation. The safe period after ovulation is from the first day after the end of the ovulation period to the day before the next menstrual cycle. The safe period after ovulation is safer than the safe period before ovulation. This is because some women are affected by environmental and emotional changes, which can lead to premature ovulation and a shortened safety period before ovulation.
The safety period for adult women is 7 days before and 8 days after menstruation, which is a calculation method used by many people for contraception. In addition to the calendar method calculated by days, there are also basal body temperature method and secretion observation method. However, the safe period is not absolutely safe. Sometimes women ovulate earlier or later, and the judgment of the safe period becomes invalid.
