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There are some symptoms of pregnancy that can alert you that something is changing in your body when pregnant. To leave questions should give you a test or pregnancy test especially if you are delayed or rule period.
Pregnancy test you do at home

The most convenient and fast to know if you are pregnant is the pregnancy test you can buy at the pharmacy. It is essential that you choose your day to get the test because the pregnancy hormone HCG (human chorionic gonadotropin) were reliably detected in the urine two weeks after conception and not before. It is advisable to test the first urine of the morning that has the biggest concentration of hormone.

Home pregnancy tests are carried out correctly 99 percent reliability, meaning that there is a 1 per cent of cases that can fail.
How does a home pregnancy test

Home pregnancy tests have a device that contains antibodies to come into contact with the hormone HCG acquire color, which shows the marks of the result.

If negative: ? should take another test after three days to rule out the possibility that your HCG level was low and was not detected. If you do the pregnancy test before the date, or before you have a delay of at least one day, it is likely that the test gives a false negative, and you might be pregnant. If still remains negative and your period is not you must go to the doctor to analyze the menstrual delay or exclude any other complication, such as an ectopic pregnancy (when the embryo is implanted in the fallopian tubes).

If it is positive: let not change even if the device in contact with the urine over 5 minutes and you should consult a doctor about your pregnancy, even if they do not yet feel symptoms of pregnancy. The false positive is if you have a pregnancy anembrionado (without embryo sac or empty) but the result will be positive because the embryo implanted in the uterus begin producing the hormone HCG, the pregnancy will not.
How well do the home pregnancy test

• Read the instructions carefully. The tests may have different instructions.
• Check the expiration date.
• Do not use a pregnancy test that has been in a wet or very hot.
• If you need to fill a container with urine, it must be clean and dry.
• The cysts in the ovaries (polycystic ovaries) and ectopic pregnancy (which takes place in the fallopian tubes) may produce erroneous results.
• Medicines that contain the hormone HCG can affect the outcome, as well as some uncommon diseases.

If you do the analysis of pregnancy a few days after conception, levels of the hormone HCG will be low, but even the color of the marks is soft, you are pregnant.

Pregnancy tests you do with the doctor

1. Urine Test. We took a urine sample and sent to a laboratory.
2. Blood tests. Confirm or rule out pregnancy with precision and even days before the urine test. Has no false negative or false positive.
3. Examination of the pelvis. An examination of the pelvis 6 weeks after your last period. If pregnancy is the end of the cervix appears smoother and more elongated.
4. Ultrasound. Between the fourth and fifth week and the doctor can observarte the embryo sac and in the sixth and the embryo can see and hear the heartbeat.