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.
Issues With Sensitive Tests to Detect Early Pregnancies. While sensitive pregnancy tests, that require only 10 to 20 mIU of hCG to give a positive pregnancy test result, seem like a good thing, there is one potential problem. Statistics show that 25 percent of all pregnancies end in an early miscarriage.