Determination of LH generation
       WHO expert committee pointed out: ovulation appeared in luteinizing hormone (also known as LH hormone) increased 32 hours after concentration (23.6 to 38.2 hours), or LH hormone peak 16.5 hours after (9.5 to 23 hours), the determination of LH hormone is one of the most reliable method for accurate determination of ovulation.
       According to this law, the principle of monoclonal antibody by colloidal gold chromatography using specific double antibody sandwich made of luteinizing hormone (LH) test, through the detection of female urine, deep shallow middle is observe the paper two purple ribbon and two bands, can be determined accurately "ovulation". Let you scientifically grasp the month "safe period" more accurate time.
       Comparison of other methods for ovulation testing
Ovulation prediction methods currently have the following two:
一、Cervical mucus observation:
       Cervical mucus is a fluid secreted by the cervix gland. In the menstrual cycle, cervical mucus in vivo hormones, the amount, color, character, viscosity, tension, ductility and other aspects of the cyclical changes will occur. Drying period wet period drying period. In the wet period leucorrhea more, and thin, especially when the secretion is egg white, clear, transparent, drawing the longest day, is likely to be ovulation day. Young women, lack of experience, this method due to the operation is more complex, and the accuracy is not high.
二、Basal body temperature curve method:
       The formation of ovarian corpus luteum after ovulation, the secretion of progesterone, progesterone has increased the role of body temperature, the use of the characteristics of no activity, not to speak in the morning after waking up, will be ready in advance of the thermometer in the mouth, five minutes of temperature measurement, called the basal body temperature. List the basic body temperature changes every day, from which you can see whether the formation of luteal, but also indirectly understand whether ovulation.
       Normal women's basal body temperature and menstrual cycle, like a cyclical change. In the menstrual period, average temperature between 36.2-36.5 degrees, ovulation can reach the lowest point, then rose 0.3-0.5 C for 14 days, and then in the menstrual period or day before the first world to a low level, the first half of the second half of the low and high temperature is bipolar temperature curve, said ovary with normal ovulation, and ovulation generally occurs in the temperature rising or rising from low to high in the process. If the second half of the body temperature does not rise, then known as monophasic temperature, indicating anovulation.
       Measurement of basic body temperature, can roughly understand the situation of luteal function. Reference value for the diagnosis of infertility patients with luteal dysfunction.
       The female body temperature is affected by many factors, health and environmental temperature, and the basal body temperature method itself requires strict operation is not easy, but because it is the basis of detecting the body temperature rises after the row over the eggs, the basal body temperature method can only indicate that ovulation has occurred, but not to occur in pre ovulation when, want to guide the students then again, the egg may have been close to death, late! Something like a belated effort.
       So through the detection of female urine, determination of luteinizing hormone (LH hormone) is one of the most reliable method for accurate determination of ovulation. The key is ovulation occurs after the LH hormone peak of 9.5 to 23 hours, but not before, LH can accurately know the hormone peak "ovulation" for eugenics, guide safe period contraception and infertility.

Safe period contraception
       Contraception, is seeking safety or comfort? Many traditional women will choose the former, many young men will choose the latter.
       Safety period contraception contraception is one of the highest comfort level, the most popular men, because can get used to "defend" contraception than attempt an ineffective solution ", enjoy a garden of Eden have fun. However, many young women because of the traditional artificial abortion in the same fear, revel in it "barrier free contact" pleased, but always have concerns about its safety. For modern women with experience and knowledge, comfort and safety are the key factors that need to be considered in the choice of contraception mode ". Uncomfortable contraception, slowly couples will have a "rejection", seriously affect the chance and ability to arrive happy, and even become a marriage reef.
       According to sperm, egg survival time calculation, in 3 days before ovulation or after ovulation for 2 days of this period is easy to conceive period, relatively safe period contraception is also called this period of "dangerous period".
       If more accurate ovulation period is determined". The accurate time to grasp the "safety month period", determined in the "safe" period you do not need to use any contraceptive, can fully enjoy the natural intimate sexual pleasure. Stopping sexual life or taking contraceptive measures to avoid pregnancy when approaching conception (risk). This is safe birth control.
       Safety period is divided into the period of pregnancy (dangerous period) before and after the safe period of pregnancy. The period from the day before menstruation to the beginning of conception is the period before conception. From the first day of pregnancy after the end of menstruation until the next day before pregnancy after safety period. The safe period after conception is safer than that before conception. This is because some women sometimes affected by environmental changes and mood swings affect the advance of the ovulation, pregnancy before this safe period will be shortened, but did not know their own, so before the safety period pregnancy is not safe. The ovarian cycle in a month has a row of two eggs is a very rare opportunity, namely after ovulation until the next menstrual cramps before this period of time most people won't happen second times of ovulation, so the pregnancy after the safety period is relatively safe. So far, there is no contraceptive method is absolutely safe.
       Basal body temperature measurement can only prompt ovulation has occurred, and can not predict when ovulation occurs, so it can only determine the safe period after conception, can not determine the safety period before conception.