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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 797 from week 13
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*dcsfantasticfour - 1 days ago
Week 13... I have arrived! LOL. My morning sickness is finally starting to fade away. I could however sleep 24/7. I've also started getting migraines. This is my 6th pregnancy so I know what to expect, migraines and all. I know it's still early but I swear I feel the baby move. Its always in the same place so it might just be my imagination

rachel j - 31 days ago
This site is so quiet compared to when I was pregnant with my daughter in 2007. I have been suffering from hyperemesis gravidarum and have been in and out of the hospital and pretty much in bed the last 6-7 weeks. I got a picc line last week and am getting fluids daily now. I am hoping the vomiting and nausea lifts soon. It lasted until 18 weeks with my daughter. On a positive note, I found out yesterday that I am having another girl! I am so excited. I had the cell free dna test done at 11 weeks to test for any chromosome problems and it also can tell the gender. My 8 year old daughter is so excited that she is going to have a little sister!

shoot4-2 - 42 days ago
Hey everyone! I must admit I've been feeling pretty good these past couple of weeks. Aside from mybweird digestion track and the fact that I've been struggling with constipation ive been feeling quite positive... sadly my 5 yr old son has shingles on his left hand after having the shingles vaccination around the end of February. .. smh he's spending a week with his dad and well... I'm just trying to enjoy the peace.. ive been off work for the past few days due to gas pains... so.. home resting hoping I'm completely cleaned out by this evening '/

r-baby3 - 47 days ago
Yay! 13 weeks here I am. First appt was a few days ago. It took forever for them to find the heartbeat! It was starting to scare me! But they finally found it and all is good. I cant wait to find out the gender!!!!

amy110 - 51 days ago
Why hello week 13, so glad to see you!

pookalou - 57 days ago
13 wks, dr appt today, fetal heartbeat at 152. Having to have test ran due to stomache pains doctors first guess is due to a 'smoldering appendix' her words. So we will see what happens in the next few days.

jory927 - 58 days ago
@jc.griffhuddle at my 9 week appt hr was 176 and at 11 weeks it was 171 the doctor laughed when I mentioned the theory but I'm still pretty sure it's a girl, guess we'll see soon!

sparks717 - 59 days ago
I haven't heard the heart beat yet, JCGriffhuddle, I'm sure I will on my ultrasound Thursday. It was supposed to be last Thursday. But they rescheduled. :(. Looking forward to checking on the little one. I didn't do an early ultrasound with last baby, but I'm unsure of my due date, so they insisted.

JC.GriffHuddle - 59 days ago
Hi everyone! I had a check up yesterday and finally got a heart rate on the Doppler! HR 154 so still boy or girl is up in the air! I was hoping for a good 130 or 170 so we could use the Heart Rate Theory but the world wouldn't make it that easy on us! LOL How are all my prego lady friends doing?

sparks717 - 60 days ago
Thanks jory927! It was a little scary, and embarrassing! Lol.

jory927 - 61 days ago
Hi @sparks717 so excited to be entering the 2nd trimester!! So sorry about your church incident, sounds scary! I've been having a few dizzy spells and lots of headaches, I know it's the surge of extra blood flow but I'm really hoping both taper off soon!

sparks717 - 61 days ago
It's nice to reach week 13! First trimester is already nearly behind us! I almost blacked out in church today. Had to sit on the floor with my knees up...don't know what that was all about. Anyone else have dizzy spells? Hope everyone is doing well. - 62 days ago
Last day in week13. Yipeeee!! How is MS for everyone? Mine seemed to ease off through the week but yesterday it came back full on and left me totally drained, I just want it gone. Not being able to drink water really bothers me.

daffymtz22 - 71 days ago
I'm only taking a multivitamin Prenatal pill. Would that help?

DerbyQueenDill - 72 days ago
daffymtz22: are you taking Vit B6 in addition to your prenatal?

daffymtz22 - 72 days ago
Not me. I feel so exhausted all the time. I don't want to complain though because I love being pregnant.

DerbyQueenDill - 74 days ago
Starting to get my energy back, how about anyone else?

lilgibber22 - 75 days ago
Yay for being in the 2nd trimester!!!

DerbyQueenDill - 78 days ago
Hello Week 13!

PaulaSoon2B8 - 113 days ago
There I fixed that, I just opened a new account :) - 113 days ago
So quiet around here...posts are so far and few between...I miss the days when there were multiple posts everyday...its fun to read how everyone is doing! I cant access my profile anyone else having this problem? I can see everyone elses but not my own :( - 116 days ago
Feels like nausea is SLOWLY subsiding....although I still experience it at times, and dry heaving...gosh I hate that feeling :P 13 weeks and counting wow....hope everyone is feeling healthy and well as can be of course :) This is going to be a rough go for me, I started off the pregnancy over weight...and have quit smoking and drinking coffee to give baby the best chance...going to take a lot of self discipline not to fill these voids with extra crappy food lol. But I am determined...I don't want to carry a bunch of extra weight around...especially if we get a normal humid Southern Ontario summer!! Any body else battling the buldge during this pregnancy, and diet routines or advice...doesn't help I have a desk job Monday to Friday 8 to 4...limiting my mobility 5 days a week, but its emotionally and mentally draining....and am exhausted when my day is done, even then I have 7 children and a husband to go home and tend to :) Any advice or input would be much appreciated :) - 117 days ago
1morefor4...Im still battling the same symptoms :( Nausea almost constantly...and tired all weekend long. I seem to plunge through my work week, but by Saturday Im down for the count. My last 2 children now aged 2.5 and 1...I didn't take my maternity leave, just 2 weeks vacation time....I am looking forward to my year off this time around!!

kekea - 119 days ago
1morefor1 i didn't get my energy back until week 14 so i hp you feel better soon . Now my skin looks like a 14 year old mood swings are terrible. I am extremely patient with my childen but now i find myself getting overwhelmed. I had an ultrasound and the tech and i both agreed that we saw girl parts. Hopefully she is still a girl so that we can start planning for permanent bc

1morefor4 - 119 days ago
treadingwater--my only suggestion is a humidifier. I suffer from pregnancy congestion which causes frequent nosebleeds. I've had it every single pregnancy and it gets worse in the 2nd trimester.

treadingwater - 120 days ago
Having this baby I can't seem to breathe through my nose. Anyway to help? I do not have mucous. It's not allergies. I do not know what to do.

1morefor4 - 121 days ago
And as far as pregnancy symptoms. I'm still nauseous and tired. But I'm always hungry too. And having mood swings and bad skin.

1morefor4 - 121 days ago
I'll be wearing summer dresses, yoga capri pants, and sandals to get through the summer months of this pregnancy.

1morefor4 - 121 days ago
Hey ladies. I have a new blog update on my profile. I finally finalized my due date with my midwife. So I'm due on Oct 5. I'm not having an NT scan now. I heard the heartbeat through the Doppler. And I have a belly now.

RowdyRandi - 123 days ago
I'm starting to look pregnant now. Guess since this is my second the belly is rounding sooner. Despite that still haven't gained any weight yet and still fitting in regular pants(well except one pair is too snug)

RowdyRandi - 123 days ago
Kekea another safe thing to take while pregnant is acidophelus pills in vitamin section. Walmart has 2 bottles for about $9. Just one pill a day

kekea - 126 days ago
Mamalira I have been drinking lots of water. I will try yogurts . How are you feeling? I finally have my energy back . I was able to work my whole work shift without feeling extremely exhausted and I even worked out...

mamalira - 129 days ago
keka are you taking a probiotic?? that will help you with the constipation along with a ton of water! I hope you can go soon. Nothing worse than not being able to poop. lol

kekea - 129 days ago
That's nice mamalira. I am still extremely fatigued and in addition I have been backed up for almost a week (sorry if tmi). Grrr.

mamalira - 130 days ago
So glad to be in week 13! We announced it last week. :) We got to hear a strong 140bpm on Thursday too!! Nausea is gone too!!

kekea - 132 days ago
Hi week 13!!! Feeling pregnant,looking pregnant, and I'm pretty sure I felt flutters. I have not officially announced my pregnancy but I have had 3 people ask me if I was pregnant this week. Lol.

beckym - 135 days ago
Just bought a maxi dress last week, pairing with a knit light open over shirt, it is cute how the belly shows beyond the overlay.

3timesthecharm - 143 days ago
And 14 weeks tomorrow woot woot

3timesthecharm - 143 days ago
Since these are summer babies what are you ladies thinking your summer wear will be .... Mine just maxi dresses and chucks

holz8519 - 143 days ago
went for my first trimester scan today measuring 13w1d. Baby was in bad position was hard for tech to get measurements. Was not able to get a glimpse of sex but guessing from the stubbornness I'm sticking with my gut feeling that it's a girl lol. I got for my anomaly scan April 22nd and hopefully then the baby will be more cooperative and we can find out for sure. I'm just so excited to see my lil one is growing and looking healthy. Deciding how to share the news with my in-laws. This will be their 4th grand-baby.

austinjeanxo - 143 days ago
Hi everyone, hope all is well.... I haven't been on much... Working a lot and having HG really sucks =[ we are not going to be finding out the sex so this should be fun!!! My oldest turns 4 tomorrow!!!! I can't believe she's getting so big !! I think I'm Also feeling little flutters.... Can't wait for stronger movements!!!!!!

jamie86 - 143 days ago
Becky my daughter that just turned 4 today bf until she was 16 months. She self weaned but I was also 6 months pregnant so my milk dried up. I don't mind bfing until 2. I would have let my young bf for 2 more months but I had just lost my 2nd baby last year and needed to stop for myself. Free2bmom and holz I've been feeling a little movement since about 12 weeks but the last few days it's really picked up.

jamie86 - 143 days ago
Had appt yesterday and baby was moving like crazy trying to run from the doppler. Hb was 150 and they offered the panorama test. I went ahead and had it done. Wasn't going to since they hadn't offered and it won't matter what the results are but knowing will be nice. Can't wait for my ultrasound tomorrow morning. Hoping we can find out the sex but if not I'll know from the blood work.

holz8519 - 144 days ago
Hi ladies jumping a head a couple days I thought I felt my lil one move the other night. I was quietly laying in bed. It was just little flutters. This is my 8th pregnancy and hopefully 4th baby. I go tomorrow for my 1st trimester screening. I remember going to this scan for my almost 4 yr old daughter and I had to go twice because she was so active they couldn't get all the measurements the first time. lol

beckym - 145 days ago
Well I guess I am shuffling off to week 14, see you gals there!!

beckym - 145 days ago
Cool, so maybe it was the baby moving!

Free2Bmom - 145 days ago
I started feeling movement at 12 weeks with this one. Not little flutters but I was kinda laying on my side and stomach and I felt the baby do a full turn. My doc Said it's possible with your second or third to feel movement this early. I feel little kicks all the time when I sit down for a few mins.... Depending on my blood sugar. I can't feel it on the outside with my hand yet. I also had dated a week ahead though at my last ultrasound. I didn't feel movement with my son until I was about five months and by then you could feel his kick with your hand on my stomach too. Nothing better than feeling those kicks :)

beckym - 145 days ago
I thought I felt movement in my belly today, but I could have been wrong. I look forward to every day movement because I am showing now, and it will make me feel less fat and more pregnant. I went to my niece's 18 year birthday dance party, and when I put on a dress I asked my kids if I looked ok, they said yes, then I asked if I look pregnant, again a yes, then I asked if I look fat, they had mixed responses, of sort of and a little bit. My favorite part of the second trimester is the baby moving, enough that you know they are there but not 3rd trimester foot stuck in rib cage.

beckym - 145 days ago
Jamie, epidural totally freak me out, a friend of mine had one and it went wrong was leaking spinal fluid, back was totally messed up for a while. As far as nursing, Anthony was half and half until 6 months I was like you with Felicity, she didn't want to stop breastfeeding where Anthony hated it, Felicity breastfeeding fed up to 2, then I saw the movie grown ups, with that breastfeeding feeding 4 year old, that was my wake up call, but then I woke up one day with torticolus, a neck spasm pain women get that leaves you in agonizing pain and barely any neck control. Went to the hospital, they said muscle relaxers, pain killers and a neck brace for the next 1-2 weeks would fix me right up, I said I'm breastfeeding, they asked how old my baby was, I said 2, they said maybe this would be a good time to stop. I told Felicity we couldn't breastfeed because of mommy's neck, she said, ok mommy feel better. Later when the neck brace was off and I was well again, she came to me, placed her hand on my knee and asked if I feel better, I said yes, I feel much better; then she asked can I breastfeed now, I said sorry honey, the milk is all gone, she cried for about two hours straight. Michelle I breastfed til about a year, trying not to repeat the time before, lol.

jamie86 - 145 days ago
Delarla so exciting! Congrats!!! I'm hoping to find out Wednesday. Becky- pitocin is rough. I have never gone completely natural but have never had the epidural either. Couldn't have one if I wanted to. I have found that IV meds don't help all that much either so I don't know why I end up asking for them. As for breastfeeding, it didn't workout with my oldest but I bfed my girls until after they were 1. My youngest was 22 months when I finally got her weaned. The maxi dresses are so cute. I'll be buying some for this summer too! Redhead- so exciting. I wanted to have that done but hubby didn't want to find out that way. Knowing if there was a problem with the baby would have been nice bif wouldn't have changed anything so I didn't have it done. 3times- I have hardly had any symptoms this whole pregnancy. Never once needed anything for nausea because I really didn't have any. Baby is still doing great! I've just been tired but will be that way for awhile.

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Members in week 13:
  1. Martin515 - 31 Jan 2016
  2. Darnnay - 03 Feb 2016
  3. *dcsfantasticfour - 04 Feb 2016
  4. FirstTimeMummy10 - 04 Feb 2016
  5. mummymobbsy - 04 Feb 2016

The due date from members in week 13 is from Friday 29 January 2016 up to & including Thursday 4 February 2016. See the full timeline here

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