1. Pregnancy means that a mammalian female (including human) has one or more fetuses or embryos in her body. Human pregnancy is the most detailed study among mammals. Human pregnancy lasts about 40 weeks from the last menstruation to delivery (38 weeks from ovulation). Delivery is the term of production. Many societies and laws divide pregnancy into three stages. There is a high probability of miscarriage in early pregnancy. From the middle period, the fetus can be tracked and monitored. In the later stage, the fetus began to have the ability to survive outside the mother. Because of this ability, many laws and customs regard the fetus in this period as an individual.
Second, it is the most correct and reliable method to diagnose early pregnancy with B-ultrasound. As early as the fifth week of pregnancy, that is, one week after menstruation is overdue, a circular halo, also known as pregnancy ring, can be displayed in the uterus on the B-mode ultrasonic screen, and the dark area in the ring is amniotic fluid, in which rhythmic fetal heart beats can also be seen.
Third, this test can diagnose pregnancy at the earliest. When the fertilized egg is implanted into the uterus and pregnant, a new hormone called chorionic gonadotropin is produced in the pregnant woman, which is beneficial to maintaining pregnancy. This hormone can be detected in urine about 10 days after conception. Anyone who detects chorionic gonadotropin in urine is pregnant under normal circumstances. Therefore, the test of chorionic gonadotropin in urine is called pregnancy test. Urine pregnancy test, we must use morning urine, because morning urine is concentrated and the hormone level is high. In order to improve the positive rate of the test, the amount of drinking water should be reduced as much as possible the night before.
Four, it is best to take containers from the hospital laboratory in advance, because there are preservatives, urine is not easy to deteriorate, unconditional, you can use any jar, but you need to wash it, boil it for sterilization or rinse it with boiling water. After collecting about 10 ml of morning urine, send it to the hospital for testing quickly. If the time delay is too long, it may affect the correctness of the test, especially in summer.
5. This is the easiest way. Every morning, after waking up, the body temperature is measured in bed, which is called basal body temperature. Generally, before ovulation, the body temperature is below 36.5 degrees, and after ovulation, progesterone rises, which acts on the body temperature center and makes the body temperature rise by 0.3-0.5 degrees. If the egg fails to fertilize, the progesterone will drop and the body temperature will return to normal after about one week. If you are pregnant, the progesterone level will remain high and the body temperature will remain high. The phenomenon of high temperature curve in basal body temperature lasts for more than 18 days, and early pregnancy can generally be confirmed. In addition, it should be reminded that X-rays cannot be used to diagnose early pregnancy. Because only after pregnancy18-20 weeks, X-rays can see the shadow of fetal bones, and X-rays will damage the fetus in early pregnancy.