R.M.
There are lots of "old wives tales" ways of telling the sex based on how you feel or look while pregnant, but there isn't really any truth to them. They have a 50/50 chance of being correct so you will know people who "almost always" get it right, but they are just guesses. Depending on the quality of your doc's ultrasound machine, they can tell as early as 15 weeks, but most docs like to wait til about 18-20 weeks. If your insurance only pays for one U.S. and they do it too early to see clearly, they don't get another chance unless you pay of pocket. So they usually do it at your 20 wk checkup.