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You are 13 weeks pregnant.

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Born & Birth stories

This is the last week of your first trimester and your baby weighs 14 to 20 grams. The crown-to-rump length of your growing baby is 2.6 to 3.1 inches. Your baby is now about the size of a peach. Fetal growth is amazing from now through about the 24th week of pregnancy.

A 13 week old fetus by SONOReal 3D ultrasound imaging

At this point of your pregnancy, there is a steady flow of pregnancy hormones in your bloodstream. Your body will adjust to the changes and morning sickness might stop and other early symptoms will begin to ease. Because the second trimester is approaching, feelings of anxiety or nervousness may also diminish. You have probably gained some weight by now. You are losing your waist and your clothing is probably fitting snugly.

There is a milky membrane that surrounds your baby. It is pierced by the umbilical cord and is made up of two layers, which are fused together. Your placenta provides most of the nutrients and oxygen that your baby needs. By this week, the placenta is well formed and ready to take over hormone manufacture from your ovaries. The placenta will produce progesterone and estriol. These hormones will be crucial in the maintenance of your pregnancy. Tissue that will form your baby's bones is being laid down, especially around the head and limbs. The nose and chin are becoming more prominent. Your baby's eyelids meet and fuse together and they will not open again for nearly four months. The eyes started out on the side of your baby's head and they are now moving closer together on the face. The ears come to lie in their normal position on the sides of the head. If examined outside of the womb, you will be able to distinguish male from female at this time.

The sockets for all twenty teeth are formed in the gums, and vocal cords are beginning to form.

Comments on week 13

Comments 1-49 of about 593 from week 13
14 messages have been added in the last 24 hours.
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Show latest comments from all weeks - 13.2 hours ago
Nicola, Eva is a really pretty name. I bet everyone was sooo happy to hear there's another baby on the way! I don't really feel much attachment to my little one yet but I've read that that's normal. It's weird because I felt so strongly immediately for my first one. I'm sure my love will be overwhelming in no time though :-) I haven't told my mom yet. I'm afraid she might be happy but not so happy. My husband is really excited but I'm still not finished with school so.... Oh well, I'm sure our babies will all be amazing and loved by everyone! .... Chuck E cheese sounds REALLY good right - 13.3 hours ago
Hi Alaina! Is 15 weeks better? How about ms???

NICOLA2010 - 13.8 hours ago yeah baby was kicking around apprently bless... aww i love this baby so much already.. neevr thought i would feel so much strong having 2 already.. love love love hehe

NICOLA2010 - 13.9 hours ago
hi alaina... oh i never knew that im not on the meds... but possible for the other girls.. come join our week.. hows ur pregnancy been?

NICOLA2010 - 13.9 hours ago
ive been thinking bout names i love eva f9r first name and aimey for middle.. love them

NICOLA2010 - 14 hours ago
ive been regular past few days.. been eating blueberries... i find choclate helps too lol

NICOLA2010 - 14 hours ago yeah no suprise i didnt get a scan though.. i guess monday isnt too far away... soo excited.. i just told everyone im pregnant feels good

alaina698 - 15.7 hours ago
Hi I'm from 15 weeks but no one talks in my week, so I came back here! I think the constipation issue might be caused by the anti-nausea meds! When I went off mine I was so much better! - 22.8 hours ago
Konepich I'm also still having MS, hopefully in the next few weeks it eases up! - 1 days ago
Glad your appt went well NICOLA! Too bad she didn't do a scan! My scan went well yesterday second time they had trouble with the scans because this baby is so active uh oh could I be in trouble?!? I hope everyone's feeling well. Feelinh the same over here hoping we all get some relief soon - 1 days ago
I wonder how babykhan is doing. We haven't heard from her this week. Hopefully, everything is alright. - 1 days ago
Konepich, I still have ms, although I do have a couple hours a day now in which its almost nonexistent and that's nice. I eat prunes to relieve constipation. Prunes are a natural laxative so don't eat too many or you may get diarrhea. I eat about three a day. Congrats on your new tiny family member! :-)

konepich - 1 days ago
Ladies, are you still experiencing the wonderful morning sickness and nausea? My Dr put me on the anti-nausea pills last week and still not working. What is everyone doing abt relieving constipation? I've been taking in more water and a Capri sun everyday and nothing!

konepich - 1 days ago
Nicola- the HB is normal. I was always told the higher the HB the chance is you'll have a boy. In my case, my two boys both had a HB of 164 😄 so I guess they were rgt! My nephew who will be 1 in a few weeks had the same. Its great that everything is going well for you! Hope you get your twins 😊. - 2 days ago
NICOLA, glad to hear that your apt went well :-) I think the heart rate is normal. Their heart rates are quite a bit faster than an adults. Our baby's most recent heart rate was in the 160s as well and the dr said it was great. I bet you are so excited for your scan! We won't have another scan until we reach 20 weeks. Can't wait to know who's coming into the world! :-)

NICOLA2010 - 2 days ago
had my dr appt.. all is good.. heard the babies hb 162 bpm which i thought preety high... she used tbis super old doppler.. i have a dating scan on monday soo excited.. i told her i feel it may be twins she said the doppler she used would not be able to find that out.. she just about found the hb Edit Delete

NICOLA2010 - 3 days ago
kimberly.. ha i know.. i have apricots..ddied ones.. ususlly never go past 3 days.. but i got to 4 days.. and felt like i was almost pushing out a baby.. i kept getting up from toiet and drinking water... juice helped better.. and would eat some raisins lol - 3 days ago
Nicoia, stop worrying about tmi. We're pregnant; there's no such thing as tmi. Anyone who thinks pregnancy is glamorous is sorely mistaken, lol. I've had a problem with constipation since day one of this pregnancy. Don't let it go too far because you may think it's fine then find yourself in excruciating abdominal pain like I did a few days ago. It used to be enough to eat one or two prunes per day but now I'm having to eat three, four, and sometimes five. Drink lots and lots of water. Try to walk as that helps keep things moving as well. Good luck at your first apt tomorrow. Let us know how it goes! :-) - 3 days ago
Chsaamanen, I'm sorry that you are not feeling well today :-( Today's not my best day either. I did feel okay this morning though. It seems I'm feeling drained and nauseous in the afternoons now....which is fine with me since I was feeling aweful ALL day. Good luck on your scan tomorrow. I'm not having another scan until my 20 week mark. I can't wait to know what I'm having :-)

NICOLA2010 - 3 days ago thnx hun. excited.. hopefully the dr will be able to comfirm twins or not lol... good luck with urs too... this is my very 1st appointment... excited

NICOLA2010 - 3 days ago
sorry if tmi.. is anyone not pooping everyday? im not anymore.. i went 4 days with going urgh was horrible.. i was regular up till past week.. maybe not enough fibre.. been eating fruit and veggies. even dried fruits raisins.. been eating more bread lately maybe thats it - 3 days ago
Nicola good luck tm!! Keep us posted! I go for a scan tm too excited to see baby again!

NICOLA2010 - 3 days ago
got my dr appointment tommorow wish me luck

NICOLA2010 - 3 days ago
kimbeely... yeah they r exhausting.. but wouldnt change my life for world.. i do all cooking and cleaning.. exhausting... be easier when my daughter goes back to school in September. ive definatly got my energy back cos im finding myself cleaning stuff i dont ususlly clean.. maybe already nesting lol... im still knackered but at least i can move from the couch.. and yes this group is so quiet.. i used this site in 2010 was muuuch busier.. its great site and love the setup.. - 3 days ago
Hello week 13! I was Hoping to feel magically better today like I did with my last pregnancy..not so much! Maybe tomorrow ! - 4 days ago
NICOIA, that's enough to wear any woman out but a blessing all the same :-) I have one son, he's eight and a half so I'm finding a lot of time to relax. Our groups are quiet aren't they? I see other groups were a lot more talkative. I wonder if there's another site that they're using. Oh well, maybe in a few weeks there'll be more conversation. Im glad that you are feeling better. I am feelings so much better myself. I'm getting back to my playful self :-)

NICOLA2010 - 5 days ago yay im 13 weeks next monday.. definatly doing lots better.. still taking it easy though.. a near 4 year old and 20 month old to keep on top with - 5 days ago
Last week of the first trimester! Yay! I can't say I will miss you in the slightest first trimester ;-)

kathy=^.^= - 32 days ago
Deebo*** I am also going through a subchrionic hemmorhage. It has been a long scary tough journey for me. I have a large one measuring 7x6x7 bed rest is hard when you have little ones. I have 3 boys so bed rest isn't really an option for me. Good luck and if you ever want to talk about it you can message me anytime

deebo - 32 days ago
Hi there! I'm going for numba 3! I have to girls- they're 11 months apart!! Turn 3 and 4 over the summer.. I had two miscarriages, the last one I almost bled to death.. this pregnancy has been bumpy.. I have a subchrionic hemmorhage, and am on bed rest. Wicked wicked nausea with this pregnancy, and I've already gained 25lbs. HOW IS THIS POSSIBLE??? I NEVER EAT LOL! So much vomiting.. Gotta be Cause I lay around so much, I hate it. I find out on Thursday if I can resume being less lazy.. anyone else hoping for a Christmas baby?? Maybe I'm crazy.. Having a lot of strange cravings, like salt on ice cream, and that green coleslaw on chicken! And pickles, pickles are good with evvverything.. Hahaha..

brittplus3 - 32 days ago
How scary Kathy!! So glad to hear the baby is okay. Rest up!

jh1983 - 33 days ago
Kathy// that is a scare!! Do yourself a favor and FOLLOW your bed rest. So many women say they are supposed to be on it but get bored or have too much to do. Don't chance it. Keep that little baby safe :)

kathy=^.^= - 33 days ago
I was in the er last night had the scare of my life. I started bleeding like tons when I made it to the er my pants were soaked in blood. By the time I went to the back I was sitting in a pool of blood. Did am u/s and the baby was fine Thank God my clot is way bigger now though and been put on bed rest. The to find out the sex we saw 3 white dots but also looked like some thing was sticking out the tech said to early to tell. I'm just thankful that the baby was fine heart rate was 188

jh1983 - 33 days ago
Kathy// yes I'm able to eat in the morning and early afternoon. I feel the best then. Around 4 or 5 the nausea starts to get bad. I've had my pump off half days since Saturday. So far it's going good. Can't wait for the home health people to come pick all this stuff up!! Hope all the ladies are doing well here. Anyone have any updates?

kathy=^.^= - 34 days ago
Jh*** sorry that you still feel sick :( I fight with nausea daily but I couldn't imagine what you are going through. Can you even eat anything? Hope that you feel better soon.

jh1983 - 36 days ago
Britt// yay :) congrats to you as well. This is my third child and second girl. Thankfully, I decided to keep all of my daughters clothes so I won't have to buy anything!! I'm SO glad about that. Kathy// that's very comforting to be able to listen to the baby's heart beat. I don't have a Doppler but I still have intense nausea so I use it as the same. As long as I still feel sick I feel like the baby is okay. But don't get me wrong, I can't wait until I don't feel sick anymore. Hoping to get off my zofran pump this week and just use pills. We will see how it goes because as of now it's not looking good. I've been nauseous pretty much since 11.

kathy=^.^= - 37 days ago
Congrats to y'all :) my pregnancy seems to be going good find the heart beat super fast now. Finally the bleeding seems to have stopped. Yayyyy go back to the dr on the 30th can't wait hope everyone is doing good

brittplus3 - 37 days ago
Jh- we had an ultrasound today and tech guessed girl too!! Congrats!

brittplus3 - 37 days ago
Jh- we had an ultrasound today and tech guessed girl too!! Congrats!

jh1983 - 38 days ago
Went and got an ultrasound yesterday. Everything looks great. She thinks it is a girl. Of course we already had a boys name picked out and nothing for a girl!!!!

kathy=^.^= - 39 days ago
Yay week 13 so excited that I made it here can't wait until my next dr appt. hope all is doing good

shaym007 - 47 days ago Here's the link to the group...

zwiebelpulver - 48 days ago
Hello week 13! I just did the backing soda test. Just for fun. Turns out there was no fizzing so it indicates an other girl for us. Has anyone else done the test before? And was it right?

2XMommy2B - 51 days ago
Can someone post a link to the FB group? When I typed in I-am-pregnant into the search it brought up a few pages but I can't seem to find the one linked to this site...I agree, when I had my son 6 years ago the site was very active but it's a little less now

shaym007 - 53 days ago
I am in a larger fb group I was I added too, but there is. A much much smaller one, maybe 6-7 of us? We are due in December? She had it nov/dec, but I don't think we have any November ladies in it, you guys should join that one.

aprilrose - 62 days ago
I find the Facebook group to be the opposite, too large and sometimes spans too much time. I think they should group this site by months too. Each week only has a dozen people.

kayte-berk - 64 days ago
I found the FB group i-am-pregnant... That's all I typed in and it seems to be related tot his site. I requested to join and my request was just accepted. I love this site tho b/c of all the info I find.

JezzicaRabbit1 - 64 days ago
I used the site with my last and since it was my first baby i found the site so helpful. It's so nice to have other mommies to talk to that are experiencing the same things as you. I hope it picks up along the way. Does anyone know the Facebook page that is being used more?

lissie**** - 64 days ago
It might be the fb groups are taking over.

lissie**** - 64 days ago
I was thinking if they'd group us by month b/c of teh slow flow we'd be in better shape. Wish we could do that! Feel like I have to skip around the weeks. I've been on this site for several pregnancies and this is the first time it's been like this. It could pick up a bit though. My group did about 18 months ago with my last.

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Born & Birth stories

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Members in week 13:
  1. Babykhan - 25 Jan 2015
  2. CassieArroyo - 25 Jan 2015
  3. minibub(pink) - 25 Jan 2015
  4. MommyChech - 25 Jan 2015
  5. BriannaTruette - 26 Jan 2015
  6. Jules0508 - 26 Jan 2015
  7. nicole207 - 26 Jan 2015
  8. 5kidsngrndmomof1pr... - 27 Jan 2015
  9. KarenO - 27 Jan 2015
  10. quadt23 - 27 Jan 2015
  11. Tristenlynae - 28 Jan 2015
  12. babymcallister - 29 Jan 2015
  13. channiejohn85 - 29 Jan 2015
  14. MrsL8487 - 29 Jan 2015
  15. thandy1 - 29 Jan 2015
  16. konepich - 30 Jan 2015
  17. wantonemore - 30 Jan 2015
  18. HBrunner - 31 Jan 2015
  19. kellyx05 - 31 Jan 2015
  20. madeleine - 31 Jan 2015
  21. mamajeny - 31 Jan 2015

The due date from members in week 13 is from Saturday 24 January 2015 up to & including Friday 30 January 2015. See the full timeline here

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