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 68 from week 13
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jinx - 8.5 hours ago
2nd trimester yay!!!

mum-2-2 - 2 days ago
yeah, I'll be in here tomorrow just having a quick peek! hopefully that means MS will ease a little more. hope everyone is well in here

baby3andme - 4 days ago
Very quiet! Had an OB appointment today. Dr. was out so I had to see the nurse practitioner again. I am so anxious to try to beg my dr into letting me try for a vba2c! I imagine he will say no, but gosh!! I will not go down without a fight! :)

Madilyns♥Mommy - 4 days ago
It's very quiet in this week

Madilyns♥Mommy - 8 days ago
Can't wait, 13 weeks on Wednesday!

lostandfound1684 - 11 days ago
brookebaby I wish I had a sonogram now so I could test that! My last was at 12 weeks and it was so fuzzy, still looked like a jelly bean lol. But my friend got one at 15 weeks recently and she found out already its a girl. My doc is insisting on 20 weeks for the ultrasound...uggggghhh. The waiting...

brookebaby3 - 12 days ago
There is the nub theory. Most techs won't take a guess at the gender this early. There is a website called www.ingender.com it's full of ultrasound techs that will guess but your ultrasound 11-13 weeks. In you google the nub theory you'll see the difference in boys and girls. It can be up to 95% accurate. That may give you a little something to hold on to until knowing for sure. I think I'm having a girl based on my babies nub shot. It you have a full body profile picture of baby post it on in gender or here any ladies will take a guess.

3demis - 13 days ago
Lostandfound- Thank you so much for your reassurance. Its not an easy feeling to work through but I'm trying. Iwantagirl- I know what you mean! This is definitely our last. If I knew for sure my 4th would be a boy, I'd go for it but I couldn't handle finding out the 4th is another girl

iwantagirl3 - 13 days ago
Sorry for the many spelling/typo errors typing from my phone and my phone thinks its smarter than me... :-)

iwantagirl3 - 13 days ago
Hi. I find it so ironic that I happen to have read at your week because I am currently sorta trying to conceive but I have 2 boys. I am literally double guessing whether I wanna get pregnant again because I know its my last chance at having baby girl! Its an eemotion that I struggle with for the same reasons that you all have. I love my boys but I want a girl! I am terrified at my feelings if it does turn out to be another boy..I know Iill love him but like you say ill morn never having that mother daughter relationship! :-/ and I really don'tthink we will hshave a 4th. Lol

lnlm1220 - 15 days ago
Even though its my third, I'm super anxious about finding out what I'm having. I have an ultrasound at 14 weeks, has anyone had your doctor guess at what your having so early? Im going to ask her to take a peak! I love having a son, but I really want my daughter to have a sister close in age, so I'm hoping for a girl!

lostandfound1684 - 15 days ago
3demis I just wanted to reassure you that feeling is SO normal! I have felt my previous 2 kids were girls and both were boys, so I have 3 boys. I was shocked and even shed tears in the sonogram room. HORRIBLE to even think that I did that!! Its not that I was sad to have another boy, because I treasure my boys, but it was the realization that I might never have a girl and all those mother/daughter moments, and that made me sad. Its complicated emotions to work through. But I know how guilty I felt about it, and felt bad when I read your post...just wanted to let you know Ive heard from SO many moms who felt the same right after they found out. NO worries and I dont judge u!!

3demis - 18 days ago
I got my MaterniT21 results back yesterday. It said I am having a girl. I hate to say it but I am a little disappointed since I have 2 girls already. I know once she is here I will be so ready to dress her up and love her no matter what, but this will be our last pregnancy so it was just disappointing to hear. The good news is I won't have to buy much since I still have so much from my other 2. I don't wanna seem like a bad mother or that I don't want this child because I really do, just looking for a place to vent without judgment. Good news part 2- results came back negative for abnormalities :) Sigh of relief after a very stressful 2nd pregnancy

brookebaby3 - 18 days ago
Mamacourt- if its not smelly or just odd in color it's should be ok and normal. I get a ton of discharge and its just our bodies natural way of cleaning itself and making sure no bacteria reaches the cervix and baby. You can wear panty liners but make sure you change them often so you don't get a yeast infection. Also make sure you give yourself some time to breath down there lol. Air out.. Sounds terrible but it helps!

martin515 - 18 days ago
Opted out of the NT scan, but ended up having a quick ultrasound Tuesday to get the heartrate bc they couldn't find it on the Doppler. Well turns out, IT'S A GIRL!! I couldn't be more excited! I have 2 boys at home and have been hoping for a girl. I know it's early, so I'm still gonna get a gender determination ultrasound at 16 weeks to know for sure. What a relief though!

saba_dew@yahoo.com - 19 days ago
Hello gurlz :) start week 14 today :) cant believe d first trimester is ova. So relieved. I had my nuchal usg n blood test done, got d results n everything seems fine :) so luckily my doc says d triple marker wont b neccessary... M so relieved. Next wud b anomally scan at week 18. My nausea seems to hv subsided except for d occasional bouts bt d acid reflux is makin me sick :( Hw r things at ur end? Wat all tests hv u all been thru yet?

lnlm1220 - 19 days ago
Mamacourt...ive had that all 3 pregnancies, personally it stops around 24 weeks and then it looks just like water so I'm constantly panicking my water is leaking lol

Mamacourt - 19 days ago
Thank you for all the kind welcomes!! Can I ask you guys a gross question?? Ive noticed a few days every week ive noticed thick Mucus.. down there.. it doenst have a smell but can range from cloudy to yellow to a tan color...I have no cramping. I have been attributing it to recently having sex.. but I just wanted to see if you guys had experienced this..Sorry to be so blunt..

mummy twice - 19 days ago
hi everyone had my scan today 13week+1.. all is well.. is having a really good pregnancy no m/s or anything just really tired but I do have 2 half yr old and a 15month old to run around after lol. hope everyone is well xx

zem7 - 20 days ago
can not believe that i will be 14 weeks tomorrow. thats so crazy!! lol Hope everyone is doing well. Welcome Mamacourt!!

lnlm1220 - 20 days ago
HELLLO week 16 :) and welcome mamacourt. Still feeling good besides this ridiculous cold the kids and I have had for about a week! :( I feel like its never going away!!

sarebear - 20 days ago
welcome mamacourt

Mamacourt - 20 days ago
Hi Everyone.. Im new here... was suggested by my sister... Im 13 weeks 3 days.. This is my first pregnancy... after over 2 years of infertility.. We are over the moon.. Still scared to death.. Im loving reading everyones comments. I have no idea what to expect, but I know I am so excited to meet this little one.. Best Christmas present I could ever wish for. Hope to make lots of mommy friends on here!!

zem7 - 20 days ago
wow what happened to everyone!? So quiet in here. Still having bad MS hope that goes away here soon...Want to get back to feeling better.

annonshey - 22 days ago
14 weeks tomorrow. Can't believe second trimester is here already! There's such little time to prepare! Oh my...lol.

zem7 - 24 days ago
So I had an ultra sound today to figure out why I am having all my spotting. Well we found 2 small bleeds. this has me worried, hopefully it doesn't hurt our baby. Anyone have this happen? On a happy note, baby is measuring 2 days bigger than due date.

gigous3 - 25 days ago
Feeling good today. Went to appt. and got to hear my baby's heartbeat so I am feeling much better now. Counting down for my next 4 week appt. to hear it again. Can't beleive that I am almost 14 weeks, it is going fast. Renzie - it sounds like you may sick, I would call your doctor and go from there. There are some medications you can take although, I try hard to stay away from them. But sometimes you need to get better too.

Renzie - 25 days ago
Hi everyone, congratulation to all of us! im 13 weeks pregnant and right now i feel like my belly is so heavy and i feel like the baby is gonna come out or something, its a bit painful and when i lay down and get comfy in one side im okay but does anyone know wsup with this kind of felling? also im cold and when i touch my forhead its hot and my head hurts? what do i do???

annonshey - 26 days ago
Went in for my colpo today, and the doctor did 2 biopsies even though he said he almost never does biopsies on pregnant women's cervix. I will find out the results in a week, basically will either be something we can watch or it is cancerous and I will begin seeing an oncologist. Anyone else had a biopsy on your cervix during pregnancy?

gigous3 - 26 days ago
armywife - That's my thought too since I do have one of each. I have clothes for up to a 5 year old boy also and my daughter who will be 2 soon. The seasons will be off, but it'll work. I figure it will be fun to buy a few new outfits for both a boy and a girl to take to the hospital and maybe a blanket for each as well and see which one I get to use. My last pregnancies I couldn't wait to find out what I was having and counted down and it seemed teh pregnancy went so slow. This time though, I am super excited about not knowing and the pregnancy seems to moving much faster this time. Appt. tomorrow, start week 14 on Monday and in six weeks be halfway there.

armywife63 - 27 days ago
Zem7 - I think I'm having a boy, but my husband and mom think it's a girl. I saved every article of clothing my 5 year old son has ever worn, so I'd be fully stocked in the wardrobe department if it was a boy. Plus, I'm comfortable with little boys now. On the other hand, a little girl would be lovely too. It would give me a great excuse to go shopping. Gigous - I think your plan is perfect...since you've got one of each, why not have a wonderful surprise on delivery day!

gigous3 - 27 days ago
I do not want to know what I am having this time. I have a boy and a girl already so we are going to wait for the surprise on delivery day. I've always wanted to experience that. I did however, get it right for both, but I don't even want to guess this time. I am happy with whatever. I have a step-daughter as well so I would like my son to have a brother, but I would also like my daughter to have a sister who would be close in age. But I really have no preferance.

bigbellyonbaby - 27 days ago
Zem7~I think I'm having a boy. I had put up my ultrasound and ask for suggestions but no response yet. It just seems like this pregnancy is so much different with no morning sickness and cravings sweets. So I'm just hoping for that the gender prediction is right. After all, it stated me on the path of a boy :-)

annonshey - 27 days ago
Thanks armywife. I just cant think about it, otherwise i'm just gonna stress and worry. Nothing i can do at this point, it is what it is......i was really hoping to not have anything to worry about for the remainder of my pregnancy.

zem7 - 28 days ago
JUST FOR FUN- What gender are you hoping to have? What is your gut feeling on what you will be having? ~~~Just thought we could all play around before a lot of us start finding out what we are having. I sooo want this to be a girl. My gut also says girl, but I don't know if I should trust it or not, because it could just be me wanting one so much that is making me think this is one lol....

armywife63 - 28 days ago
annonshey - I worked with someone many years ago who had one done while pregnant. I don't think she had any complications and I know she had a healthy baby in the end. Sorry you have to deal with this issue...I'll be thinking about you.

annonshey - 28 days ago
Doctors office just called to tell me that my pap came back with high grade precancerous cells, and they want me to come in this week for a colpo. Has anyone else gone through this during pregnancy?

sophie-hannah - 28 days ago
Army wife- it's a pregnancy thing xxx i get them a lot i got most of them before i found out i was pregnant x

armywife63 - 29 days ago
Has anybody else had trouble with nose-bleeds? It seems I'm getting one every couple of days. Sometimes they are just light, but other times they can be heavy. My next appointment is on the 31st, so I'll mention it to my doctor then. I don't know if it's pregnancy related or because we've been running our air conditioner. I've tried using a humidifier at night, but I'm not sure if it's helping all that much.

gigous3 - 29 days ago
Happy to be starting week 13 today. Next appt. is this Friday and I am hoping to hear the heartbeat to put my mind at ease. It still doesn't seem real to me even though I've already had an ultrasound and so the baby and a super strong heartbeat. But still I have had spotting hear and there and saw bright red blood last week that luckily came and went very fast. Still concerns me though. Countdown until Friday and finishing out the first trimester!

sophie-hannah - 31 days ago
I hear you on the bloating! :( it's so poop i know it's not bump but it looks like a huge one lol.

avaann - 32 days ago
is anyone else soooo bloated?!? i'm miserable and feel full all the time!

hopingfor - 33 days ago
Rollo chocolates, frozen chocolate milk, mangoes, soups and fries with garlic sauce.... That's my weaknesses and its scary. I have no sense of moderation in the least.

sophie-hannah - 34 days ago
Ha Ha sharing my craving with everyone lol you all need to pile on the weight too then i wont feel so bad!

sarebear - 34 days ago
mmmmmm skittles

sophie-hannah - 34 days ago
Hello 13 weeks :) 15 weeks by dates lol. Symptoms seem to be dissapearing apart from the pickled onion,cadbury fingers and skittles craving lol.

waitingtoexhale - 35 days ago
Off to week 14. Whoo Hoo!!

waitingtoexhale - 35 days ago
Dulcisgrl- it's all a little crazy and scary. I had almost the same probs when I had my son. Had 3 early mc's, then pregnant. They didn't monitor my progesterone levels back then and I did not take the pill supplements early on. When I saw specialist around 16 wks, he put me on weekly injections to try and prevent early delivery. We only made it to 32 wks but my now 4 yr old is perfect! Don't know if the injections could have kept him in longer, but I'm praying they will this time. (I developed preeclampsia last time, so emergency c-section due to that). The injections really didn't bother me at all. Yes, slight irritation at injection site but no real pain or serious side effects. After the first one next week, I'll even be giving them to myself- don't want to drive for that. Hoping and praying all goes well for you and your LO!!! Good luck!

dulcisgrl@hotmail.com - 35 days ago
Waiting- that's almost exactly the same situation I have been in. I had three miscarriages all by 7 weeks before I finally went to a infertility specialist who put me on progesterone and aspirin until 12 weeks for my last pregnancy. However my son came at 34 weeks because my water broke. They never monitored my progesterone levels though. This pregnancy my doctor said something about taking progesterone shots at 20 weeks I think to prevent preterm labor. She said they hurt though so I'd be interested to see what you think of them when you get them. I finally told my family last week I was pregnant because I am always so nervous. Still haven't told anyone at our church yet and probably won't for a few more weeks too lol

eightisenough - 36 days ago
Happy Mother's Day!!!

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Members in week 13:

jmama2013 - 16 Dec 2013
nonamae101 - 16 Dec 2013
baby3andme - 17 Dec 2013
jjbronder - 17 Dec 2013
Madilyns♥Mommy - 18 Dec 2013
reesemama - 18 Dec 2013
A.Bruce - 19 Dec 2013
Kassi5kids - 19 Dec 2013
Milica - 19 Dec 2013
MrsRoberts08 - 21 Dec 2013
motherofgals - 22 Dec 2013
mum-2-2 - 22 Dec 2013

The due date from members in week 13 is from Monday 16 December 2013 up to & including Sunday 22 December 2013. See the full timeline here

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