Why do I still look pregnant?

You may be very surprised by the way your tummy looks after birth. Your baby is out, but there it is, right around the navel: a big, round, squishy puffball that makes you look like you're still six months pregnant. Many women also have a dark line down their abdomen called a linea nigra and a web of stretch marks, which are actually little scars caused by the extensive stretching of skin. Those who had a c-section have surgical scars to contend with as well.It takes time for your body — and especially your belly — to fully recover from pregnancy. Imagine your abdomen as a balloon, slowly inflating as your baby grows. Childbirth doesn't pop the balloon, it just starts a slow leak. But don't worry — it's a steady one.From the moment your baby is born, hormonal changes cause your midsection to deflate, shrinking it back to something closer to its pre-pregnancy state. It takes about four weeks for your uterus to contract to its normal size. All the cells in your body that swelled during pregnancy will begin releasing their fluids in the form of urine, vaginal secretions, and sweat. And the extra fat you put on to nourish the baby will start burning off (especially if you're nursing and exercising). But it takes at least a few weeks to see noticeable results.Stretch marks and the linea nigra, however, endure longer. The good news is that stretch marks usually become considerably less noticeable six to 12 months following childbirth. Their pigmentation fades and they typically become lighter than the surrounding skin (the color will vary depending on your skin color), but their texture will remain the same. The dark color of the linea nigra will gradually fade over a year, but that too may not completely disappear.

source- babycenter.com