The metro network is planned to be expanded up to a length of 877km with 22 lines. The annual ridership of the metro in 2012 was 2.276 billion. Beijing Subway, China. Beijing Subway, Chinaâs oldest metro system, currently ranks as the worldâs third longest subway system comprising of 17 operatinglines spanning a total length of 456km.
A papyrus described a test in which a woman who might be pregnant could urinate on wheat and barley seeds over the course of several days: Testing of this theory in 1963 found that 70 percent of the time, the urine of pregnant women did promote growth, while the urine of non-pregnant women and men did not.
For confirming pregnancy, the timing of testing depends on how accurate a woman is about the day she expects her menstrual period as well as the method used for testing. In general, blood tests are more sensitive than urine tests and can be done two days before a woman would expect her period to start.A urine or blood hCG test can be done reliably by 10 days after a missed menstrual period.Even using a urine test, a woman may be able to determine whether she is pregnant the day she misses her period, but the result could be falsely negative.ccasionally, an hCG test is used to screen for pregnancy if a woman is to undergo a medical treatment, be placed on certain drugs, or have other testing, such as x-rays, that might harm the developing baby. This is usually done to help confirm that the woman is not pregnant.