Natural methods of contraception mean avoiding pregnancy without using any physical or hormonal ways. The time of a woman’s ovulation, i.e. when her eggs are available for the sperm to fertilise is avoided for sexual intercourse in these methods. There are also ways in which men do not allow their semen to enter into vagina by taking it out at the last moment.
In this method, a woman’s period of ovulation is calculated based on her previous 12 periods. The previous 12 menstrual cycles can determine the first and last day of fertility. The method is to subtract 18 days from the shortest menstrual period and 11 days from the longest menstrual period experienced in the last 12 cycles to arrive at the first and last fertile days respectively. This will give an idea of the no. of days in which she can ovulate. The more irregular her cycles, the more will be a woman’s fertile days. The effectiveness of this natural contraception method has been calculated at 80%.
The body temperature of women during ovulation is examined and temperature shifts of 0.05 ° after luteal phase of ovulation is critical. The woman under observation should observe abstinence in the first half of menstrual cycle till the days the temperature is high by that degree. This natural contraception method does not have a high rate of success because interpretation and maintenance of temperature chart is not the easiest task.
This is the withdrawal method of contraception which is completely dependent on men’s ability and alertness. Men take out their erect penis from the vagina just before ejaculation of semen. It has great benefits and some serious disadvantages too. It is the simplest way of natural contraception and does not involve any cost. The downers are that men have to compromise their complete sexual pleasure and even after that, only 65 % success rate is achieved. That means 35 out of 100 women may still get pregnant after using this method. The precision of time for taking out of the penis is difficult to achieve with this method. Even a single slip-up can cause pregnancy even though the couples may have done it successfully several times.
In this contraception method, the levels of cervical mucus and its volume is gauged in relation to ovulation. The cervical mucus can be felt in the vagina by fingers to identify the dry and wet days. The woman is fertile during wet days. This method depends on the observation of changes in the consistency and the volume of cervical mucus in relation to the ovulation. On feeling the cervical mucus in the vagina by fingers the dry days and the wet days are recognized by the women. The wet days are the fertile days. There are 10 wet days in a 28 day cycle of menstruation. Wet days begin with 2 to 3 days of sticky white mucus, followed by 3 to 5 days of slippery profuse mucus. The last stage is when there is sticky mucus for 3 days, after which the fertile period ends. The success rate in this method is 78% only as some women fail to observe the stickiness of the mucus properly.
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