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Baby names arrow Pregnancy Book arrow Second Trimester arrow Pregnancy Week 21
Pregnancy Week 21
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The baby’s sleeping schedule becomes more regular and synchronized with the outside environment.

Your Baby

The skin is becoming less clear now and more opaque.  The baby’s sleeping schedule becomes more consistent.  Medical research suggests that the environment affects the baby’s sleep pattern while in the womb.  The amount of light, noise and your lifestyle patterns serve as signals for the baby’s own rhythm. 

At this point the baby’s length is measured from the top of the head to the heal, and the baby should measure about 10.5 inches!

Changes in your Body

The average expected weight gain at this point is about 10 to 15 pounds.  Put up your feet when possible to reduce ankle swelling.

As your hormone levels stabilize, you may feel more peaceful and relaxed emotionally.  The uterus rises to about an inch above the naval. 

You may want to inquire about childbirth classes at this point.  Childbirth classes can teach you  to recognize the symptoms of labor, familiarize you with the process of birth and give you invaluable techniques and advice for dealing with pain.  Classes should cover the first stages of motherhood as well, teaching newborn care and breastfeeding techniques.  Check your local hospital or ask your healthcare provider about classes scheduled in your area.

Further reading

< Pregnancy week 20             Pregnancy week 22 >

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Comments (6)Add Comment
Baby Growth
written by Jamyla Evans, November 16, 2007
the baby is now 10.5 inches.. But the week before the baby was only 6.5 inches.. Can it really grow that derastically?
Re: Baby Growth
written by bojana, February 06, 2008

Until week 21 the baby's length is measured from crown to rump; from the week 21 it is measured head to toe.
?
written by Stasha, November 21, 2008
so with the new sleepinh pattern does that mean i wont feel him move as much
Re: ?
written by Jessie lynn, April 24, 2009
stasha, I asked my doctor the same question. You should be able to feel him still move just as much even when hes sleeping. Like anyone moves around in there sleep. You should feel them more at sertain times of the day and night. Example: For me they move right after breakfast then in the afternoon,between lunch and dinner, and right before bed when im relaxin.
...
written by christina borquez, April 19, 2010
My little girl don't move as much as I would think. Should I be worried. I'm 21 weeks today
...
written by deshawna, June 19, 2010
I'm 21 weeks and my baby is such a busy bee he or she moves so much that everytime I go for my ultrasound appt they never can tell the sex of the baby because of all the constant moving. Does anyone know any techniques to determine the sex of the baby

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