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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 633 from week 13
1 messages have been added in the last 24 hours.
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lynt - 26 minutes ago
At week 13. Yay! Time seems to be going slow. I am obviously pregnant although some people seem to think that I got really fat. I am starting to get pains in my lower back. Starting to look at types of cribs, strollers and car seats. I won't purchase anything until I get past 7 months but I like planning ahead.

mngirl1281 - 5 days ago
I have not been on this site in weeks as some of us moms created a secret FB grp. There's about a dozen members if anyone else interested. I'm gonna try and check in here too though as I love the week by week guide:) My Sonoline B picked up baby heart rate at 168. What a beautiful sound. Hope all you gals are feeling good and doing well!

brandyleigh - 7 days ago
I posted my ultrasound from today heartbeat is 164 what do u think boy or girl?

brandyleigh - 8 days ago
Check up and sono tomorrow!!! Can't wait hope all is well with my little one last time at 12 week sono we found out we lost her so hopefully all is healthy this time!

LiLBean5 - 10 days ago
Brandy I am SO excited that we are in the 2nd row of numbers!! 13 weeks for me too!! :) Can't wait to get to that 3rd row next!!

brandyleigh - 11 days ago
Hello week 13! So crazy to already be almost in the middle of the second row of numbers!!

LiLBean5 - 14 days ago
Hi ladies there is a secret FB group for Iap for feb/ march due dates if you want in send me a request at the original admin puts everyone as admin so we can add new ppl. :)

LiLBean5 - 14 days ago
Hi mommyluv it's great to see you here! I hope everything gets better as it's the 2nd trimester now!!

MommyLuv2 - 14 days ago
Hi ladies!!! So happy to be back:) I'm just joining in at 13 wks.... Looking forward to chatting with you all for the rest of this journey ...... I was on here with my previous pregnancies and have met some wonderful mommy friends.... We still keep in touch til this day! So far this is by far the worst pregnancy ever..... Was extremely sick with GH.... I'm finally able to eat again, but cannot keep water down for the life of me:( I just want to chug a gigantic water!!! Those are my issues right now.... Other than that I'm going for team yellow this time around.... Hubby wants to find out the sex so bad, I am leaning towards not finding out as we did with both boys, this is our last and I'd love the big surprise :)

rainbowbaby2 - 18 days ago
Room4onemore, I just got your email and emailed you back :)

room4onemore - 18 days ago
Good thing I am on modified best rest because otherwise I might feel guilty for staying in bed all day outside of work.

room4onemore - 18 days ago
Rainbow baby I emailed to join the secret group!!!

rainbowbaby2 - 19 days ago
Hey ladies there is a secret FB group for Iap for feb/ march due dates if you want in send me a request at the original admin puts everyone as admin so we can add new ppl.

cutezilootz02 - 22 days ago
Hey guys I'm still very sick in the mornings, it just won't go away! I had a bit of blood in my vomit the other morning.. I'm guessing this is normal if you don't have food in your tummy ? Any one else experience this? Got my doc appointment tnite to get my ultrasound results back so fingers crossed it's all gon well x

tripplets - 24 days ago
Timefor2 thanx...will discuss with my gynea...I am having my 3rd cs in 4 yrs...have to do told any other pg is very high risk.

Timefor2 - 26 days ago
Tripplets---I am actually the opposite of you, I fear anything that has to be placed IN me. I am so afraid to try IUD's or that arm thing so I just stick to pills. I was placed on pills when I was only 15 to help regulate my period and have been on the same one since. I am one of those 'don't mess with what works' people I guess. I have thought about trying something different after this baby because the one bad thing about the hormones is that they KILL my sex drive like it is almost non-existent on them. I am just worried about trying anything else and it failing or me hating it.

tripplets - 26 days ago
Timefor2 that we are in trimester 1 is mathematically incorrect...anyway good thing is we move to 14 next week...glad to be in week 13 too.. Just wondering what everyone uses for family planning, nothing seems to work for me.. tried coil and it made me anaemic, I fear the methods with hormones..HELP?

Timefor2 - 27 days ago
First day of week 13 for me! I know this site says we have another week in the first trimester but some others say this is the second trimester...I think I like that idea! lol.

NICOLA2010 - 33 days ago
konepich... also expecting third i dunno why it seems even more exciting the 3rd time.. and the last time.. i just think its amazing get to experience this all over again.. amazing

NICOLA2010 - 33 days ago
konepich... sorry not replied sooner.. sorry about ur loss all those years ago.. its good he stood by u.. every loving partner shoukd do.. i think preety much every guy thinks and dreams about the days before children... for women its in us, and i think the transistion easier for women cos of hormones.. and the gradual build up to everything from getting pregnant to giving birth to be with ur bsby 24/7

NICOLA2010 - 33 days ago
so a lady gave me a ton of glass baby bottles recently and just gave me a bassinet how awesome... with blankets and sheets.. goto love free stuff... now i need a free doiuble stroller lol

NICOLA2010 - 33 days ago
cutey24u...oh ok.. well thats awesome.. let us know how u got on asap

cutey24u - 33 days ago
konepich - what i had done was called panorama and it is not only done for women 35 or over i am only 29 :) Nicola - it tests for Downs and they are able to determine gender through blood :) I am hoping to find out tomorrow!

NICOLA2010 - 35 days ago
so its 34 c here which is crazy hot for me.. cos winter in alberta canada weather can be minus 40c anyway i have super stiff neck and really achey elbows and fore arms.. and dunno why? had my blood work todsy so maybe im lacking something? find out few days.. may need extra calcium

konepich - 35 days ago
Its called harmony. Its offered to women who are 35 and older. It tests birth defects with an accuracy of 99%. It takes two weeks for the result to come back. Our u/s specialist said its covered by insurance.

NICOLA2010 - 35 days ago
cutey24u... u can find gender via blood test?

konepich - 35 days ago
Nicola- mine was the same way. He didn't want to get married at all but we found out we were expecting almost 11 years ago. Sadly, we didn't carry to full term but hubby didn't run off as some would have done. We've been married 9 yes and have 2 beautiful (way too) smart boys. Now expecting the 3rd. To this day, he dreams of the single life but in the same note he won't trade it.

cutey24u - 35 days ago
There are doing gender through blood test. I can't wait to find out although I wish I could see my lil one again, I won't see him until 20 weeks. It had definetely gotten real! Now I feel in shock and I think when she tells us the sex I am going to pass out! Nicola maybe we will have boys together!chsaamanen I am so glad you got to hear the heartbeat!

NICOLA2010 - 36 days ago
had my ultrasound... baby looks soo cute... the tech says she sees a scrotum.. but she cant tell me for sure if its a boy cos its still kinda early... so now i think its a boy ha... aww just love this baby so much already.. i have another ultrasound booked in another 6 weeks time.. i can hardly wait - 36 days ago
Had my prenatal today and herd baby's heart beating away for the first time! My hubby and 2 year old came to hear as well everyone was so excited! Still feeling nauseous and exhausted today maybe tomorrow I'll feel better lol fingers crossed ! Cutey24u how lucky you get to find out the gender! I have to wait until my mid pregnancy ultrasound!!

cutey24u - 36 days ago
Since I will be here tomorrow, had a doc appt. on Friday heartbeat was 159 she was having a hard time because baby kept running from her. LOL! I was so relieved to hear this and actually went online and ordered sonoline B fetal doppler so I can hear heartbeat whenever I want, can't wait. I should know by Friday the sex of the baby and I am soooo excited. I am saying boy all the way, don't know why but just feel it.

NICOLA2010 - 37 days ago
there should be a liks button... big hug girls.. my hubby didnt even want this baby was just for me.. sl was my son.. but he will not regret it one dsy cos thy r so beautiful... he gets stressed with the kids... but thy brng so much love.. my hubbh calls me selfish lkng story... im not he does doesng know how to trest a woman right i dont think.. - 37 days ago
Konepich, it's really hurtful when someone is not happy for the life of your child.....actually, it's infuriating! My adopted mother and her children will not be the happiest (that's why I haven't told them) because they're all extremely successful (Doctors and such) and I only want to teach and be a mommy. They were disappointed when I chose education for my major (grade school education is a low paying job here in the United States) and will be disappointed now that I'm pregnant again before I graduate but (excuse my language) 'F' them. We will love our children and if they don't want to, they know where they can go! My husband's family is ecstatic and we will have half of Belgium here for the birth of our little one. My friends are extremely pleased as will be my biological family. I'm sure there are lots of people happy about your little one too! Surround yourself with them :-) - 37 days ago
Konepich - that sounds frustrating! She should be happy with how many grandchidren she is blessed with! Not to mention it's not really her choice hehe! Enjoy your pregnancy as long as you and your hubby are happy that's all that matters !!

konepich - 37 days ago
Nicola - I told my parents via text picture because I mentioned to them the night before that I might be pregnant. My dad thought I had used a previous test! 😄 but it was reconfirm with a phone call on my end. This will be my parents 3 red grandchild. Now, for my in-laws, they found out after my first u/s appt. I wasn't there to tell them so not sure what their initial reaction was. This child is their 14th. I was told after my 1 st by my mil I was not to have any more!!! All SHE wanted was 12. When I made the announcement on Fb, she was pissed (sorry) because I tagged her son, aka my hubby, and she got the 'call's. Don't know what that means but I truly don't Carr. Sorry I needed to vent!

konepich - 37 days ago
Well today is my gf's baby shower! We are so excited for her since it is her first one and she'll be 37 yo next Wednesday. Its been a rough pregnancy and a very un-enjoyable one for her.

NICOLA2010 - 38 days ago i think its cos i never thought id would have a 3rd kid.. so this is quite surreal and amazing... and ive always wanted another.. but never knew if we should or not.. but as time went on inreally wanted another and alexis my almlst 4 yr old getting reslly maternal and loves babies.. and shes so excited

NICOLA2010 - 38 days ago
kimberly thankyou... yeah i told my mom dad and siblings when i was like 4 weeks along haha.. friends and distant friends in england told just now.. my mom and dad happy for me.. my mom loves knitting she had 4 kids herself... yea normal not to feel connection yet.. and agree feel more connection knowing what gender - 38 days ago
Chsaamanen, I've been thinking the same thing; once I know the gender I will be so much more attached. I heard the same thing about baby number two and am really hoping that is the case. Cross our fingers! :-) - 38 days ago
I'm in the same boat as Kimberley, I am having trouble attaching myself to this baby and besides feeling completely exhausted and nauseous I find I forget I'm pregnant! I think it's beacaue I'm so busy with my job and toddler. I'm going crazy waiting to find out the gender I really think that will Help me connect with this baby! I know with my son once I foun out he was a boy I was able to relate to him better. Also can't wait to feel some Movements! They say with baby 2 you can Feel them sooner so I hope so! - 39 days 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 - 39 days ago
Hi Alaina! Is 15 weeks better? How about ms???

NICOLA2010 - 39 days 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 - 39 days 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 - 39 days ago
ive been thinking bout names i love eva f9r first name and aimey for middle.. love them

NICOLA2010 - 39 days ago
ive been regular past few days.. been eating blueberries... i find choclate helps too lol

NICOLA2010 - 39 days 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 - 39 days 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! - 39 days ago
Konepich I'm also still having MS, hopefully in the next few weeks it eases up! - 39 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

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Members in week 13:
  1. babyjsmama - 03 Mar 2015
  2. MrsAli - 03 Mar 2015
  3. nicciellis - 03 Mar 2015
  4. 2bBlessedw2 - 04 Mar 2015
  5. Lynt - 05 Mar 2015
  6. mngirl1281 - 05 Mar 2015
  7. jessikazaar - 06 Mar 2015
  8. mmyof3angels - 06 Mar 2015
  9. Charlee306 - 07 Mar 2015
  10. LiLBean5 - 07 Mar 2015
  11. lisatek82 - 07 Mar 2015
  12. mrsspence1314@yaho... - 08 Mar 2015
  13. BRE2015 - 09 Mar 2015
  14. Lunalight - 10 Mar 2015
  15. noahanryleasmomma - 10 Mar 2015

The due date from members in week 13 is from Tuesday 3 March 2015 up to & including Tuesday 10 March 2015. See the full timeline here

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