You are now in your second month of pregnancy and your developing baby is 3 weeks! You might just be finding out that you are pregnant and may have many concerns and questions. Some women still do not realize that they are pregnant yet. You might have already had a positive pregnancy test. Many tests can show a positive test result 10 days after conception, but it is recommended that you wait until you have actually missed your period. The baby has not grown very much from last week and is now approximately 1.25 mm long. You will not `show` yet for some time.