Many women who are preparing for pregnancy are eager to know whether they have successfully prepared for pregnancy. They start testing on the second day after intercourse. I can only say that you are too hasty. If internal fertilization is successful, human chorionic gonadotropin (HCG) is the fastest. It takes 6-7 days for the display to appear, and it takes at least 11 days for the fertilized egg to implant. Impatient pregnant women who want to take a test can start the test 11 days after menstruation is delayed. But what common sense issues do you need to know before taking a pregnancy test? Below, the editor of Babao.com will share with you common sense issues that you need to know before preparing for pregnancy.
Know the urine if you are pregnant
Almost every female compatriot who is preparing for pregnancy knows about pregnancy tests The wand can test for pregnancy, but you may not know why peeing can test for pregnancy. This depends on the analysis of urine components. There is something called \”human chorionic gonadotropin\” in the urine of pregnant women, which is human in English.
chorionic
gonadotrophin, often abbreviated as HCG. The main function of HCG is to stimulate the corpus luteum, maintain the continuous secretion of estrogen and progesterone, promote the formation of uterine decidua, and make the placenta grow and mature.
Under normal circumstances, the human body begins to secrete a large amount of HCG about 6 days after fertilization. HCG exists in urine and blood, so the urine pregnancy test is actually called a \”urine HCG\” test. Currently, \”early pregnancy\” tools such as test strips and pregnancy test sticks on the market mostly use HCG antibodies to test the urine of pregnant women. A positive result indicates pregnancy. The urine test result will not turn negative until one week after delivery.
However, in addition to normal pregnancy, molar pregnancy, choriocarcinoma, and ectopic pregnancy can also cause a large amount of HCG secretion. Therefore, after you know you are pregnant with a pregnancy test stick, it is necessary to go to the hospital for a check-up to rule out the above conditions.
Although the accuracy of pregnancy test sticks is very high, HCG begins to be secreted in large amounts only one week after fertilization, so errors may still occur. Some netizens have been deceived. There is only one control line on the pregnancy test stick, but they are still pregnant unexpectedly; there are two control lines on the pregnancy test stick, but they are not pregnant. Therefore, in order to make an accurate judgment, after the first negative result, you can do another test about one week apart (there are slight differences between different pregnancy test sticks).
Pregnancy test paper
Before going to the hospital for a pregnancy test, you can also test it with a home pregnancy test paper. First open the foil-sealed package, hold the top of the paper strip with your hands, and do not touch the test strip test area with your hands. Then use a clean disposable paper cup or plastic cup to take a cup of urine, preferably morning urine. There is a urine cup included in the package. Dip the end of the test paper with the arrow mark into the urine cup (the urine sample should not exceed the max line). After about three seconds, take it out and lay it flat. If a red line appears in the reaction area, it means [negative]. , two parallel red lines are [positive].
[Positive] usually means pregnancy. If there is still a red line after 10 minutes, it can be determined as [negative]. Is it accurate?
If you have confirmed that your period is delayed, you can consider using a pregnancy test paper to test pregnancy.
The pregnancy test paper is still relatively accurate, but read the instructions of the pregnancy test paper carefully. You will find: menopause
The 1-day test is 99% accurate. The so-called 1-day amenorrhea means: if menstruation is due on Wednesday, then Thursday will be 1-day amenorrhea.
If you test in advance, the accuracy cannot be guaranteed.
99%.
When is the best time to take a pregnancy test?
The specific time depends on individual circumstances.
However, according to
According to FDA data, it can be concluded that the later the detection time, the higher the accuracy:
In menopause
1 day test, the accuracy is 99%;
Test the day before menstrual period, the accuracy is 99%
93%;
Before menstruation
4-day test, the accuracy is only 42%;
Before the menstrual cycle
If tested within 6 days, the accuracy is only 25%.
Urine test
Principle of urine HCG detection
After the embryo is implanted into the uterus, it begins to secrete a hormone called human chorionic gonadotropin (HCG), and within 48-72 hours The rate of doubling rises rapidly. Currently, the most commonly used methods for detecting early pregnancy are urine tests or blood tests, which test for HCG. However, the two detection methods are different in detection techniques and time.
Urine HCG test time
Early pregnancy self-test or pregnancy test stick refers to urine HCG test, but due to its low sensitivity, only human villus The amount of membranous gonadotropin can only be detected when it reaches a certain concentration. Some self-pregnancy tests are more sensitive than others, and more sensitive ones may be able to detect low concentrations of human chorionic gonadotropin a few days before your next period. But whether you use ordinary or more sensitive early pregnancy self-test strips, if you test too early, the amount of human chorionic gonadotropin in your urine may not be enough to make the result positive. Women with regular menstruation can take the test when their next menstruation is usually due, that is, about two weeks after ovulation. Women with irregular menstruation can use the morning urine test 14 days after unprotected intercourse.
Urine HCG detection method
1. Pay attention to the production date on the packaging box and do not use expired pregnancy test sticks. When in use, tear the aluminum foil bag along the gap and take out the pregnancy test stick.
2. Hold one end of the handle of the pregnancy test stick tightly with your thumb, and tilt the end of the urine suction hole downwards. Note that the observation side of the pregnancy test stick should face downwards, and the direction of the plum blossom pattern should face upward
3. Drip urine into the urine suction port and maintain the urination time for 1 to 2 seconds (please note that when urinating, you should avoid the urine wet observation window and the latter exceeding the mark marked MXA! Otherwise, the pregnancy test (The wand will fail)
4. Then flip the pregnancy test stick so that the observation window faces upwards, and continue to hold the pregnancy test stick diagonally. When you see purple-red liquid crawling on the observation window, wait for 1 minute. A purple-red line will appear on the inner observation window. The pregnancy result can be determined after 1 minute, and the non-pregnancy result can only be determined after 3 minutes. The results interpreted after 5 minutes are invalid!
5. It is emphasized again that it is best to use morning urine, and it is not easy to drink a lot of water at night to avoid diluting the urine.
Blood HCG test
Generally, the test is conducted at least 9 days after the day of fertilization. This test is more accurate than the urine test. The blood test focuses on the concentration of HCG, while the urine test only detects whether it contains a specific value of HCG. The blood HCG early pregnancy test can detect the increase in β-HCG in the blood from the 9th to 11th day of fertilization. In other words, pregnancy can be detected through blood tests as early as the 9th day of pregnancy.
Compared with urine tests, blood tests are more accurate. After all, blood tests directly measure HCG.Concentration, while a urine test only tests whether it contains a specific value of HCG.
If the urine test result is negative, there may be many reasons. In addition to the fact that you may not be pregnant, it may also mean that your ovulation time is later than you think, so it is far from enough to detect your HCG during the test. In early pregnancy, the concentration of HCG will continue to increase, increasing by 1.5 times every two days, but it does not increase continuously. It reaches a peak around the 12th week, and then shows a decreasing trend until the end of pregnancy.
Blood HCG early pregnancy test can be detected from the 9th to 11th day of fertilization. Usually after the urine test, the doctor will further determine whether you are pregnant through a blood test. The accuracy rate is 99.99%.
B-ultrasound examination
B-ultrasound confirms whether you are pregnant by detecting whether there is a gestational sac in your uterus. Compared with detecting HCG, progesterone and other hormones, B-ultrasound is actually more intuitive and accurate to detect pregnancy.
B-ultrasound is usually done in the early stages of pregnancy, mainly to determine whether the intrauterine pregnancy is normal. In the 4th week of pregnancy, B-ultrasound still cannot see the signs of pregnancy; in the 5th week, a small fetal sac can be seen, which accounts for less than 1/4 of the uterine cavity, or the fetal bud may be visible; if in the 6th week, in addition to the fetal sac, there is also The fetal bud and fetal heartbeat are visible.
B-ultrasound examination is also well known to everyone, and the test is usually performed 45 days after the day of fertilization. This examination directly targets our uterus. It is also the most intuitive and accurate detection method. The diagnostic standard rate is very high. Moreover, this examination can also conduct certain tests on the development of the fetus, the position of the placenta, the amount of amniotic fluid, etc. Analysis and judgment is also the most trusted method of pregnancy testing.
B-ultrasound examination is 100% accurate in the fifth week after conception.
Self-observation
Changes in early pregnancy include the following aspects:
1. Menopause:
Menopause is the earliest and most important \”signal\” in early pregnancy. Any married woman of childbearing age whose menstrual cycle has always been normal, ifIf menstruation is more than 10 days past due, the possibility of pregnancy should be considered. If menopause lasts more than 2 weeks, you need to go to the hospital to check the cause.
2. Early pregnancy reactions:
Most women may experience dizziness, fatigue, drowsiness, increased salivation, loss of appetite, nausea and vomiting after 6 weeks of pregnancy. Phenomenon, vomiting usually occurs in the early morning or on an empty stomach. Some pregnant women particularly like to eat acidic and cold foods. The above-mentioned phenomena are called early pregnancy reactions and usually disappear on their own around 12 weeks after pregnancy. A small number of people\’s early pregnancy reactions are more severe and last longer.
3. Increased frequency of urination:
After 8 weeks of pregnancy, the frequency of urination may increase. This is due to the pressure and stimulation of the enlarged uterus. Caused by the bladder. After 12 weeks of pregnancy, the uterus extends beyond the pelvic cavity, the bladder is no longer compressed and stimulated, and the symptoms of frequent urination relieve themselves.
4. Breast changes:
After pregnancy, under the joint stimulation of estrogen and progesterone, the breasts gradually grow from the 8th week onwards. Large, the nipple and areola are darker in color, there are dark brown nodules around the nipple, etc. After 12 weeks, there will be a little watery milk secretion.
5. Changes in basal body temperature:
Women who measure their basal body temperature can know early pregnancy. A woman\’s normal basal body temperature follows a two-way curve, that is, it is low before ovulation and rises after ovulation. If menstruation is due but no menstrual period occurs, the body temperature does not fall after rising and remains for more than 18 days, which indicates pregnancy.
Warm Tips
We know that ovulation begins around the 14th day of the menstrual cycle Yes, assuming fertilization is successful at this time, it will take 6 or 7 days for the fertilized egg to produce HCG at the earliest, so the earliest pregnancy test time is 6 days, that is, the pregnancy test can be done 6 days after intercourse. However, if you want to be more accurate, wait until 11 days later, because HCG really starts to be secreted in large amounts after the pregnant egg implants, and it takes at least 11 days for the pregnant egg to implant, so the more reliable pregnancy test time is the 11th day (i.e. 11 days after having sex). In addition, B-ultrasound pregnancy test is performed at about 5 weeks. At this time, it can also be seen whether the gestational sac is in the uterus.
