Fetal Development Weeks 9 Through 13

See what's happening with your baby in the third month of your pregnancy.
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Week 9

Sometime in the last few days, the first detectable brain waves went coursing through your baby's head. What kind of thoughts might she be thinking? She's nearing an inch in length, about a big as your pinky toe.

Boy or girl? The answer to pregnancy's biggest question was actually settled seven weeks ago, at the moment the egg was fertilized when the sperm contributed either a Y chromosome, which would create a boy, or an X chromosome, which makes a girl. But until this point in its development, the embryo has had no outward signs of gender. This week, the gonads, or reproductive glands, come into being. They are the tiny beginnings of either testes or ovaries. But don't rush to get your ultrasound just yet- those tiny sex organs won't be visible for another six to eight weeks.

The baby's muscles are growing and getting stronger, and its movements are increasing. Elbows, knees, and other limb joints are distinguishable. Any day now, toenails will appear at the tips of budding toes.

Next:  Week 10

 

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Comments
Comments (12)
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chaneyjazmine1 wrote:

Im on my second child n the first one was easy but i dont know how this one will be but the sit has helped me a lot

10/22/2011 02:24:14 AM Report Abuse
yolimes1 wrote:

anonymous wrote am about 11 weeks my son is about 15 years am 40 years but am happy about it

3/5/2011 06:05:04 PM Report Abuse
bobbiephifer wrote:

This is my third child im happy but also scarred i havent did this in 5 years so i dont no what to expect it like having the first one all over again. IM EXCITED!

2/28/2011 03:33:53 PM Report Abuse
anonymous wrote:

on my god im having a baby for the first time and im scared

7/5/2010 04:15:18 PM Report Abuse
Kettner_poua wrote:

I enjoy coming on this site and sharing my growing life with you ladies and reading all your wonderful stories. I'm 10 weeks and have no bump nor gained any weight. This will be my second child. My boy is now 5 and very excited to have a new sibling. Hopefully I will not show until 7 months like my first. Thank you to all you ladies that I have talked to and shared your stories with me. Even though some of you are many miles away its nice to know your here.

5/18/2010 11:09:45 AM Report Abuse
Rose_Tocco wrote:

i am starting my 11weeks and already got bump. I thought it won't be visible till 4-5month because this is my first pregnancy and I am not Twiggy either..I guess my mom was luckier then I am(She didn't show till her 7th month! and I was close to 10 lbs when I was born)

3/27/2010 07:37:05 PM Report Abuse
ladykrazicrip03 wrote:

Well this is my 3rd child. I used this site with my daughter 3 years ago. I loved this site 3 years ago and I love this site just as much now.

3/2/2010 12:55:56 PM Report Abuse
www.anasia0214 wrote:

This info is so useful and entertaining...my mother also died but only 6mnths ago so my baby is gonna fill that void and it excites me to know all this is happening in my body !!! I have a 5 year old daughter and hopefully this is my baby boy....Congrats ladies !!!!

2/3/2010 07:38:06 PM Report Abuse
itsBonita2u wrote:

WOW....i'm happy! this is wonderful!

1/30/2010 02:29:25 PM Report Abuse
JaNette wrote:

This is such a great site for me. My husband and I are pregnant with our first baby. My mother died three years ago and all my sisters are far away from me. So its not like I can call them up anytime. I'm not sure what to expect. So its nice to know that I can depend on this website when I have a question. ~Thank you

1/24/2010 09:03:24 PM Report Abuse
anonymous wrote:

i love the info i can get on this site it is so helpful and calming. Im having my first baby and im no where near family and my husband will be deployed for the birth and last half of my pregnancy so having this site is really a blessing. Thank you!!!

1/24/2010 10:33:48 AM Report Abuse
kimbonilla7 wrote:

OH MY GOODNESS I LOVE THIS WEB SIT IT IS SOOOO HELPFUL!!!!!!! THANKS!! THIS IS MY FIRST BABY AND I'M IN MY FIRST TRIMESTER. LOVE THIS SITE! THANKS AGAIN!!!!

1/13/2010 08:01:22 PM Report Abuse
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