Biochemical pregnancy tests and more

Pregnancy aspects are not as complex as many believe. Yet, it is important to understand how pregnancy tests work. When the fertilized egg is implanted on the wall of the uterus, it begins to feed on. This wall is covered with a nutrient-rich tissue called deciduas, which was specially prepared by the effect of a hormone, progesterone produced by the corpus luteum of the ovary.

You can always be blood tested for pregnancy- it is up to you. In case you did not know, the implanted egg behaves as a foreign tissue body of the mother, and that each of its cells carries genetic information that is 50% coming from the father. Consequently, the mother could activate its defense system and reject it. To defend against this possible rejection, it cells begin to produce a hormone that stops the menstrual cycle and stops the maternal immune system. This hormone is called human chorionic gonadotropin or hCG. Simultaneously, the corpus luteum of the ovary secretes another hormone, progesterone, for the same purpose. 

HCG Determination. As the fetal hormone hCG is not present in the woman if she is not pregnant, her determination confirms the existence of pregnancy. From week 4 (week 2 of pregnancy real), ie 1 or 2 days of menstrual delay can recognize a measurable concentration of hCG in maternal blood or urine to confirm pregnancy or not.

Analysis of hCG in urine. The pregnancy hormone in urine can be measured by home pregnancy test that can be purchased at the pharmacy and used from the first day of menstrual delay. If positive (+) no doubt pregnancy because this test has no false positives! If it is negative (-) and menstrual delay continues, repeat about 5 days later because the amount of hormone produced may be below the level necessary to activate the reagent. If after this time is still negative (-) may not be pregnant and your delay is due to other reasons.