The functional principle of ovulation tests is based on detecting the concentration increase of luteinizing hormone in urine. A small amount of hormone is always present in urine, but 24 - 36 hours before ovulation (when the ovule gets ready to leave ovary) its concentration goes considerably up.
The time of ovules readiness up to leaving ovary varies from 8 days to a month, most often it takes about 2 weeks. The factor affecting flawing of this process is the time required to reach maximum level of estrogen. Big amount of estrogen contributes to luteinizing hormones increase, the hormone in its turn helps the ovule to travel through ovarys wall in a few days after the hormones level increase. After the end of ovulation the ovule moves to small pelvis, where its picked up by fallopian tubes appendage, known as fimbriae. In order for ovules fertilization to succeed, spermatozoon must enter the body at the same time as the ovule leaves follicle. This process may seem easy to happen, but after the ovule leaves ovary it stays in active condition only for a day, while spermatozoon can exist up to three days. So, the coitus should be performed at a certain time, if it is for pregnancy.
Many women nowadays are doubtful from which day the testing should be started. This day mostly depends on cycles duration, and the menstruations beginning ought to be counted as the first day. Cycles duration is the number of days between the first day of previous menstruation and the first day of the next one. If the woman has regular cycle, she should start the testing from approximately 17th day before the next menstruation, that is because "yellow body" phase begins on 12th - 16th day of the cycle, in most cases on 14th day.
If the cycle duration is changeable, the shortest cycle for 6 moths should be chosen and exactly its duration ought to be used to calculate the first day of testing.
To sum up, if the cycle tends to be completely inconstant and the delays for month or more occur, using tests without tbe support of extra follicles and ovulation process surveillance is considered pointless, as the test has a high cost. Therefore, if you dont take the test every day, you may miss the ovulation day, while always taking the tests wih such cycle is very expensive.
The time of ovules readiness up to leaving ovary varies from 8 days to a month, most often it takes about 2 weeks. The factor affecting flawing of this process is the time required to reach maximum level of estrogen. Big amount of estrogen contributes to luteinizing hormones increase, the hormone in its turn helps the ovule to travel through ovarys wall in a few days after the hormones level increase. After the end of ovulation the ovule moves to small pelvis, where its picked up by fallopian tubes appendage, known as fimbriae. In order for ovules fertilization to succeed, spermatozoon must enter the body at the same time as the ovule leaves follicle. This process may seem easy to happen, but after the ovule leaves ovary it stays in active condition only for a day, while spermatozoon can exist up to three days. So, the coitus should be performed at a certain time, if it is for pregnancy.
Many women nowadays are doubtful from which day the testing should be started. This day mostly depends on cycles duration, and the menstruations beginning ought to be counted as the first day. Cycles duration is the number of days between the first day of previous menstruation and the first day of the next one. If the woman has regular cycle, she should start the testing from approximately 17th day before the next menstruation, that is because "yellow body" phase begins on 12th - 16th day of the cycle, in most cases on 14th day.
If the cycle duration is changeable, the shortest cycle for 6 moths should be chosen and exactly its duration ought to be used to calculate the first day of testing.
To sum up, if the cycle tends to be completely inconstant and the delays for month or more occur, using tests without tbe support of extra follicles and ovulation process surveillance is considered pointless, as the test has a high cost. Therefore, if you dont take the test every day, you may miss the ovulation day, while always taking the tests wih such cycle is very expensive.