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.
https://www.babycentre.co.uk/a549375/your-babys-movements-in-pregnancy
Your baby is now 13 ¾ inches (35 cm) long and weighs 2¼ pounds (1 kg). Around week 11 your baby’s eye lids became fused, but around the 27th to 28th week babies can open and close their eyes. Your baby has also developed a regular wake and sleep cycle. Unfortunately, it may not be the same as yours. You may also begin to feel rhythmic movements in your uterus and wonder what is happening.
http://americanpregnancy.org/week-by-week/27-weeks-pregnant/
Question: Should I worry at 20 weeks, that I haven't felt the baby move? Feeling the baby move for the first time, quickening, is excited and worrisome all at once. When you feel it will depend on many factors. Answer: No, while it's hard not to be concerned there really isn't much to be concerned about. First time moms will usually feel their baby's movements between 18-24 weeks.
https://www.verywell.com/when-can-i-feel-the-baby-move-2759748
Most of the time, if it's her first baby, it's around 20 weeks that they'll feel little flutters, says certified nurse-midwife Marion McCartney, who practiced for 24 years before becoming director of professional services for the American College of Nurse-Midwives.
http://www.webmd.com/baby/features/when-feel-baby-move
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.
http://americanpregnancy.org/while-pregnant/first-fetal-movement/
If you have been keeping a chart of your baby’s movements and you notice a significant deviation in the pattern, contact your health care provider. If you do not feel 10 movements within 2 hours, try again later that day. If you still do not feel 10 movements within 2 hours, you should contact your healthcare provider.
http://americanpregnancy.org/while-pregnant/first-fetal-movement/
There are many things that will affect how soon you feel the baby move, including: 1  Your Weight. 2  Location of your placenta (Anterior Placentas sometimes prevent. 3  How many babies you've had before (Once you've felt it you are more likely to remember and recognize the feeling.)
https://www.verywell.com/when-can-i-feel-the-baby-move-2759748
By this point in your pregnancy, you can feel your baby move much more. Some of your baby’s movements could be due to hiccups, while others feel like your baby is participating in an aerobic workout. Many women find these movements comforting, and these often help strengthen the bonding process between mother and child.
http://americanpregnancy.org/week-by-week/27-weeks-pregnant/
She may be a couple weeks off on her dates, too, McCartney says. A fetus is still pretty small at three months -- it's about four inches and weighs just over an ounce. It's bigger and increasingly active by the end of the fourth month. But occasionally women feel movement as early as 12 weeks.
http://www.webmd.com/baby/features/when-feel-baby-move
When will I start to feel my baby move? 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. (You may have witnessed his acrobatics if you've already had an ultrasound.)
https://www.babycenter.com/0_fetal-movement-feeling-your-baby-kick_2872.bc
when should i feel the baby
You should feel the baby between 16 and 22 weeks.