37 to 41 weeks
You should feel your baby's first movements, called quickening, between weeks 16 and 25 of your pregnancy. If this is your first pregnancy, you may not feel your baby move until closer to 25 weeks. By the second pregnancy, some women start to feel movements as early as 13 weeks. You're more likely to feel baby move when you're in a quiet position, either sitting or lying down. Fetal Development Basics & Pregnancy. At 4 weeks, the cells of the fetus are specializing into a nervous system, hair, organs, and skin. At 12 weeks, the fetus is around 2 _ inches in size and makes movement on its own. At 20 weeks, the nervous systems functions, sex can be determined, and you will feel your baby move. At 28 weeks, the fetus weighs over 2 pounds and if born prematurely, would most likely be able to survive. At 32 weeks, the baby weighs 4 pounds and fat layers begin to develop under its skin. Your doctor will use your gestational age to track your baby's growth and development and possibly to schedule tests throughout your pregnancy. Normal gestation can range from about 37 to 41 weeks, so estimated due dates are accurate for only about one out of every 20 pregnancies. You probably won't feel your baby kick until sometime between 16 and 22 weeks, even though he started moving at 7 or 8 weeks, and you may have already witnessed his acrobatics if you've had an ultrasound. Veteran moms tend to notice those first subtle kicks – also known as quickening – earlier than first-time moms. Your build may also have something to do with when you'll be able to tell a left jab from a hunger pang. Thinner women tend to feel movement earlier and more often than women who carry more weight. Inside pregnancy: Weeks 15 to 20 A 3D animated look at a baby in the second trimester of pregnancy. Count your baby's movements in the evening-the time of day when the fetus tends to be most active. Lie down if you have trouble feeling your baby move. Most women count 10 movements within about 20 minutes. But it is rare for a woman to count less than 10 movements within two hours at times when the baby is active. By the second pregnancy, some women start to feel movements as early as 13 weeks. You're more likely to feel baby move when you're in a quiet position, either sitting or lying down. You'll get the thrill of feeling your baby move. Your pregnancy: 15 weeks. Your growing baby now measures about 4 inches long, crown to rump, and weighs in at about 2 1/2 ounces (about the size of an ap... Your pregnancy: 16 weeks. Get ready for a growth spurt. Your build may also have something to do with when you'll be able to tell a left jab from a hunger pang. Thinner women tend to feel movement earlier and more often than women who carry more weight. Inside pregnancy: Weeks 15 to 20 A 3D animated look at a baby in the second trimester of pregnancy. Some moms can feel their babies move as early as 13-16 weeks from the start of their last period. These first fetal movements are called quickening and are often described as flutters. It may be difficult to determine whether this feeling is gas or your baby’s movements, but soon you will begin to notice a pattern. First-time moms may not feel these movements as early as second-time moms. Some moms, especially those in their first pregnancy, may not feel movement until 18-20 weeks. Remember that each woman and every pregnancy is different, so you may not feel movement as early as another woman. There is a broad range of when the first detection of movement can be felt, ranging from 13-25 weeks Your baby won't be on the move constantly. Like you, there will be times when he just wants rest and sleep. Towards the end of your pregnancy, he'll rest for about 45 minutes at a time (de Vries and Fong 2006) . The rests might feel longer than this, because you won't feel every movement.  Towards the end of your pregnancy, your baby will rest for longer periods. These will usually last for about 20 minutes at a time (de Vries and Fong 2006) , although they could be as long as 50 to 75 minutes (RCOG 2011) . They might feel longer than this to you though, because you won't notice every movement. The first time you feel your baby move can be a particularly exciting and emotional moment in your pregnancy. It's amazing to think about your baby squirming around, and you're bound to wonder what he's getting up to in there! obstetrician. While an ultrasound can identify fetal movement as early as 7 to 8 weeks of pregnancy, women generally don't begin to feel the baby move until sometime between 16 and 22 weeks or later, particularly if it's the woman's first pregnancy. The initial sensations you'll notice aren't real kicks, either. 
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at what gestational age can you feel a fetus move