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 819 from week 13
13 messages have been added in the last 24 hours.
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Brittany Lane - 2 minutes ago
Just turned 13weeks today, yay I cant wait to find out what my baby is?????? I know I got a while but still. I have heard the HB twice 166 and 162 its so exciting. My next app is Dec 1st I will be counting down, also feeling so much better each and every day. how are you guys let me hear your thoughts?

mom of 3 plus 1 - 36 minutes ago
Hi ladies .. Guess i am in week 13 now , awesome!! Congrats to all the ladies leaving week 13.. I hope this week brings a new experience.. I don't get the 12 week scans like most of you ladies.. Do you think that is bad?? I don't get one till 20 weeks.. Good luck to all you ladies..

mrsjdwilliams - 3.1 hours ago
omg this is crazy...my last day in week 13! These weeks are flying i pray it continues! Anyways just had a serious craving for some lemon pie 8 in the morning...so i'm off to the store to get the ingredients! lol

kel xxx - 10.8 hours ago
hey all week 14 2day woopwoop hope everyone is well c you all there xx

mrsgrenat - 12.9 hours ago
Hey Everyone. Congratulations, we are almost through the first trimester! I wanted to share my happy experience. We had an ultrasound today and I got to see the little one moving all around! I could not believe how clear everything was. They just recently got a new machine that is very detailed. The baby was bending and stretching and rolling over...it was amazing!

addysonsmom25 - 15.3 hours ago
I had an ultrasound and Dr. Appointment on Wednesday. got to hear the heartbeat and see my little peanut! Super excited! I get to find out what I am having on December 14! YAY

mrsjdwilliams - 19.2 hours ago
hi ladies. i'm back. i did go in yesterday for the neck pain and headaches. doc couldn't figure out what was wrong but my bp was a little high. they put me on some meds and i have to go back tomorrow just to make sure things are getting better. on a good note i got to hear my precious child's healthy heartbeat and we could hear it with the doppler which shows a positive change in baby's position. also haven't felt movement yet. with DS i felt movement early in the 14th week so i thought i would of felt this one by now...my dr said i haven't felt the baby move yet probaly because of my retroverted uterus which is why the baby is so low. on a happy note my belly has seemed to grow alot over the past week! so excited...i'm almost into my maternity pants! also i've been having pains in my lower abdomen silly thing is you would think i didn't just have a child a year ago because i can't remeber what the heck that pain is i'm stuck inbetween RLP, stretching and braxton hicks...all i know is i do remember having these pains last time. lol

firstchildat20 - 19.3 hours ago
I cant believe that i am finally in week 13 it feels great. my mom said that towards the endi will start counting down, well i guess i am just ready i am counting down now.

momof609 - 20 hours ago
way before sleeping positions get unsafe you will just flat out be way to comfortable to sleep that way... its all natural and our bodies tell us what we can or cant do.

1sttimemummyLi - 20.7 hours ago
today im unabke to walk without pain down there, been told its my pelvis widening...has anyone else experienced this??

1sttimem0m24 - 20.8 hours ago
Hey ladies thanx for the infomation u gave me in week 13 this is my last day 2morrow i be n week 14 so see you all there when your time come sendin labor dust to all week 13 members

MommaKaila - 21.5 hours ago
No movement yet, however I have seemed to 'blossom' overnight. I definitely have a bump. I can't wait until I can start to feel the baby. Doctor says anytime in the next couple weeks I might feel him or her, though I might not recognize it as movement. I go to see the Doc on Thursday! Can't wait!

twotimestx - 22.3 hours ago
Hi Week 13! Yeah! Well I had my nuchal scan this morning and all looked well. The tech said she didn't see anything indicating a boy - but couldn't get a clear reading either way. I also got my Angel Sounds doppler yesterday and heard the heartbeat at home. I can't believe it works! At first it didn't - then i realized i had to unwrap the battery and put it back in... still nothing. Then I dumped some of my expecting mommy skin toning oil (almond oil and whatever) on my belly and found it right away! I could hear the heartbeat and the baby moving. Sounded just like it does in the doctor's office. So I think it's finally solidifying that we are having another baby :) I'm not showing at all and don't really get nauseous anymore.

Pookie2287 - 1 days ago
Last day in week 13!!! My pregnancy is going by fast! Can't wait to find out what it is

JuliesFirst - 1 days ago
I don't feel movement either. Doctor's on Monday!!! Hope to get a good picture and SEE the movement!

pregnantwithblessing2 - 1 days ago
1sttime~we can sleep on our sides...but I read that as our uterus gets heavier it's not as safe to sleep on your back from about 15 weeks because it could put pressure on important nerves and possibly hurt the baby...

my1stlillimabean - 1 days ago
this is my third day in wk 13 and im really excited. all i wanna do is read more and more information on whats goin on with my poo-poo. I have just a little pooch in my stomach. I wonder if people think im preggo or just have a fat stomach. I'll be glad when im showing all the way. Not as much sickness but still dont like some smells. I read sleepin on the left side is the best so I try to stay on that side other than that I sleep on the right

JessicaWicklund - 1 days ago
I just want everyone to know heart rate can not tell the sex of the baby it is a myth the heart rate of your baby fluctuates as they grow and as they move. Heart rates start out slower, and then by 8-10 weeks run in the range of 170-200 BPM. As your approach mid-pregnancy the average heart rates run between 120 - 160 BPM. If your baby moves, his or her heart rate goes up, just as your heart rate does with movement. However, none of these is related to the gender of your baby. A study was actually done to test this theory. The study actually shows that there is no correlation between gender and fetal heart rate. Each one of my pregnancies were diff and my first baby had an average BPM of upper 130s and they were a boy and my second was an average BPM of the mid to upper 150s and they were also a boy.

JessicaWicklund - 1 days ago
1sttimem0m24...I was never told how I should sleep and this is my 3rd baby...Just sleep whatever way is the most comfortable and you will find that the farther along you are its easier to sleep on your side because all that weight on your belly makes it hard to breathe when your on your back and your belly is going to be to big to sleep on but if you are that worried ask your Dr. next apt or call them.

1sttimem0m24 - 1 days ago
HEY Y ARE WE NOT ALLOWED TO SLEEP ON OUR SIDE YET AND ON OUR BACK SOME ONE PLEAZE HELP

pregnantwithblessing2 - 1 days ago
I was wondering...is it week 15 that we can only start sleeping on our sides??

shellyisaac - 1 days ago
Pookie2287 I know. This is my third and I still don't feel movement. I'm so looking forward to it!

juan - 1 days ago
Hi, I am 13 weeks 3 days. U/s on the 16th of Nov.(then I'll be 15 wweks) Do you think it will be possible to see the sex of the baby??

pocketful-of-sunshine - 1 days ago
I am so happy I am in 13 weeks now!!! yippee. got a NT scan monday! Nervous..its my first!

pantira - 1 days ago
Pookie2287 - i spoke with an osteopath today, and she was explaining that as baby gets bigger and you lie on your back, it puts pressure on your atora which is vital for supply of blood to the uterus. But its more of an issue when you are bigger than now

Pookie2287 - 1 days ago
Also, why can you not lay flat on your back when yoru pregnant? I heard a few people say that and I think it sounds odd

Pookie2287 - 1 days ago
I am definitely showing already its exciting. I just wish i could feel it already like some of the other ladies :-)

pantira - 2 days ago
grapefruit22 - I am also pregnant for the first time, but I am not sure if I am showing or if its just bloating... I have been so bloated since I became pregnant... :-(

Pookie2287 - 2 days ago
Yeah the first like 6 weeks really sucked but my morning sickness and headaches are gone and im getting more energy. Ilike being pregnant can't wait until I can feel my baby moving. This is my 1st so its all new for me. I have my uktrasound to find out the sex on like December 13th. I have an appointment next week but no ultrasound on that one. But I will try and see if they can do one cuz I am supposed to hear the heartbeat on the visit :-)

pantira - 2 days ago
Jamie05 - my baby's heart rate was 160... this is my first, so i am not sure on teh accuracy, but I read that under 145 boy, over a girl... I have had a feeling we are having a girl for a while... Time will tell, 20 week scan booked for 17 December

1sttimem0m24 - 2 days ago
IM 13 WEEKS AND 5DAYS I HAVE BEEN FEELIN MOVEMENT ALSO NOT SURE IF IT THE BABY BUT I THINK ITS CUZ I HAVENT FELT ANYTHING LIKE IT B4 IT FEEL LIKE SWISH MOVEMENT OR MY BABY MOVING THEIR HAND

grapefruit22 - 2 days ago
Yay! last day in week 13. I am pregnant for the first time and let me tell you, I am visibly showing. I feel like a cow. :)

AJ87 - 2 days ago
My Dr sent me to the ER last night because I was cramping horribly! My last U/S showed the subchorionic bleeding. But the U/S from last night didn't show any bleeding! They said it looks like it healed on its own! I will find out for sure if the bleeding stopped on the 11th when I go to my Dr. So I'm just praying that it really did heal all the way! I'm on bed rest until then. And I have to make sure to drink extra water. I've drank so much I feel like a fish!.. I actually love being pregnant! Besides all the problems I've had and the M/S lol!.. About the Heart rates, both my daughter and my son's heart rates were in the 150s and 160s. With this one its ranged between 163 and 148. So I can't even use it for fun. Cause they were all about the same lol! I find out the sex of the baby on Nov. 25th! I can't wait! Sorry for writing so much! =). Hope all is well with all of you!

milliesam26 - 2 days ago
well, im waiting for my next ultrasound appointment now, only 4 weeks, 4 days to go :)

momof609 - 2 days ago
I think sometimes if I hang around in the 36+ weeks groups it will somehow make me feel further along.... then when im hearing everyone talk about being induced or having their LO I remember that I havent even been able to find out what im having or get enough energy back to even do the laundry.... GRRRRR.... I think it may actually make it seem further away!!

momof609 - 2 days ago
babyblessings; gonna admit that im not a fan of being pregnant... there are MOMENTS that I do enjoy but I would be happy if we could roll all those moments into about a month.... and then be done with it. I like to see the ultrasounds, I like to feel them move but after about two weeks of kicking and pounding... im frustrated.

Biologymom - 2 days ago
I had my H1N1 shot a couple of weeks ago and I had no side effects, other than a sore arm for the day. I had my NT scan on Monday and I am waiting for the results. I was told the babies measurements looked great, so I expect good results. I also have very sore boobs. They just seem to get worse week by week. I can not remember if this feeling was as bad and how long it lasted with my first pregnancy.

jamie05 - 2 days ago
next ultrasound we confirm the sex of the baby. my last ultrasound baby would not position, so we could tell... i was told that heart rate could determine if boy or girl. my son was stayed in the 150s. this little one has been 160 and 170.. so i think i might be a girl.. anyone want to share their heart rates with me?

jamie05 - 2 days ago
last day on 13 wks... whoo hoo.. see everyone on 14!! :)

shellyisaac - 2 days ago
Yay! Week 13!!!!! So happy to be here, it's such a blessing!

mrsjdwilliams - 2 days ago
this is soo frustrating...so i got up early to schedule a same day appt knowing i still feel like crap and have been sitting here on hold for 33:14 to be exact...

mrsjdwilliams - 2 days ago
momof6-thx hun

babyblessings2010 - 2 days ago
Stephanie01 - My sore boobs arrived at week 8 and got even more sore since. Sometimes the sensation comes and goes but when they are actually growing, it really hurts. Don't need a push up bra anymore. LOL.

babyblessings2010 - 2 days ago
Baby Movements - It is said that the baby can be felt this early, esp if it isn't the first pregnancy. Experience Mommies know the difference between intestinal movements vs. baby flutters. I felt little guy do a full somersault about 2 weeks ago. Since last week started feeling those faint flutters. Usually happens in the morning when I wake up. Very rested - Best time to notice is when very peaceful and rested. All else shuts down except the little movements that the baby is making. This works: eat or drink something that will increase energy quickly and then lay down peacefully for a while. Soon enough you'll get flutter signs that the baby is getting the surge also. Enjoy the bonding Mommies because all gets better in the 2nd trimester. How many women actually like being pregnant?

Stephanie01 - 2 days ago
I am feeling it move. Especially now coz i am laughing so much at funny videos

ELIZABETH K - 2 days ago
Anybody else feeling the baby move? Not kicking but moving, I feel mine a pretty good bit now.

Stephanie01 - 2 days ago
Ive got.... Sore boobs and i cannot lie you other mommies cant deny. Hehehe who else still has sore boobies?

Stephanie01 - 2 days ago
Well the reason for the doc putting me on bed rest for the day. I was complaining about neck pain and headache and vomiting non stop. He told me to go home and sleep. I did just that and i feel so much better. Sometimes you must just take a break. One that i havent had in a very long time.

mum2bemay2010 - 3 days ago
aw im 13 weeks and 4 days pregnant today and today i felt bub move for the first time aw it was the most amazing feeling ever and since then he/she hasnt stopped aw its so exciting! and i know its moving not gas or anything omg im so excited

mom 2 blake - 3 days ago
I had a dream last night which is actually when the DH's alarm was going off.. That if i threw myself down a flight of concrete stairs he would shut off the alarm. And in the dream i did it! I woke up crying. None it actually happened. But still scary. If you cant sleep my doctor told me to take benedryl before bed. And it has been working.

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Members in week 13:

AMANDA125 - 09 May 2010
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