Hi doctor Im 24yrs old from Gwalior. I and my gf had sex on 30 June. But after that she not get her period. Her last period has been came on 14June. Now she miss the period of July month and now august is coming. My question is - She tested through Prega News Pregnancy test 2 times it is showing negative result. Is this test is reliable.And after sex period timing is increased or not? A doctor concern her to go for Ultrasound should we go for ultrasound for knowing that she is pregnant or not. pls mam help..