My friend regular period last time she got period on October 30th then  she was in contact so she have done urine test at home on November 30th but it was negative after one week again it was negative and not got period so today is her 50th day today shegot pregnancy positive ..what is the reason of this test..1.is she concive later 2. If she don't wait that time to do beta hcg blood test.3.she do upt very early or concive later 4.after 37th day she test again very lately..plz reply mam what is the reason