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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 814 from week 13
2 messages have been added in the last 24 hours.
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tryingfor4 - 3 days ago
Taylorsbunno2 not sure what I am carrying not sure that this pregnancy reminds me of the 2 boys but on the other hand it has been 9 years and I don't remember all my symptoms. Husband and I would love a girl so our daughter would hav a sister and it would be easier on the room situation. A boy would be easy with my 2 youngest being boys. I will have to wait a few weeks to find out.

Taylorsbunno2 - 3 days ago
Trying for4- ooo what do u think u may be carrying?

tryingfor4 - 4 days ago
14 weeks tomorrow had appt this morning. Baby's heart rate was 160.

Taylorsbunno2 - 5 days ago
Just had my scan. Moved me forward 5 days. So now 13+1.

weber3 - 21 days ago
I have been feeling quite a bit better for the past week. Hoping I get to hear a heartbeat at my midwife appointment next week. After that i will let myself buy some new clothes. We got rid of almost everything after our last baby.Been getting lots of headaches and allergies this week. Hormones do weird things to us.

angelfree77 - 32 days ago
I'm glad to hear everyone is starting to feel better! My appetite is back, but I still have some morning sickness. Last week, I had a headache that wouldn't quit. I've never sneezed or hickuped this much in my life and my gag reflex is in overdrive. I cannot brush my tongue without nearly making myself throw-up. Oh well, all-in-all these things are pretty mild.

kentsmommy - 38 days ago
JDH - Good for you! I still feel like someone pumped me full of air. But other than that I'm feeling a bit better. Hope all is well with everyone. I'm looking forward to October to find the gender:)

JDH - 38 days ago
I did make it! Excited for my ultrasound tomorrow! It seems like such a long wait between appointments. But I'm busy enough! my tummy has seemed to slow down. My bloating has finally gone away! I still don't feel like eating as much as I did before pregnancy which is odd for me. I'm usually a big eater. Oh well, I'll take it!

june2012 - 39 days ago
Week13, yay!!! 27 more to go, or less... Looking forward to next week so that I officially consider myself in the 2nd Trimester...

angelfree77 - 39 days ago
I had my 2nd prenatal appointment on Tuesday of last week (@13w2d). Everything sounds good. Little One's heart beat was at 163bpm. We have finally told all of our parents; now onto siblings and bosses.

angelfree77 - 39 days ago
JDH, you made it! 2nd trimester!!! - 40 days ago
13 weeks 2 days today!

JDH - 42 days ago
Jealous, I have two more days! : ) second trimester here I come! I don't care what this site says, I'm counting week 13 as second trimester!

angelfree77 - 46 days ago
Week 13, we're here!!!!!

whodeymomma78 - 60 days ago
Lots of Valentines Day babies!!! I've already found out I'm having a girl. Had to get the MarterniT21 test done to check for Down Syndrome and was able to find out the gender also!!! We are so excited. I have a 16 yo DS a 14 yo DD an almost 3 yo DS and this lil angel on the way!

ladylinksbaby - 63 days ago
Extremely upset, my insurance took 3 weeks to approve my nt scan. Only to find out the referred me to a doctor who doesn't accept my insurance. By the time it was noticed i missed out to have my scan done, i so wanted this ultrasound, i haven't had a single scan or even heard my baby's heartbeat:(

ladylinksbaby - 68 days ago
Yay week 13!!!!

*dcsfantasticfour - 71 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 - 101 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 - 113 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 - 117 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 - 121 days ago
Why hello week 13, so glad to see you!

pookalou - 127 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 - 129 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 - 129 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 - 130 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 - 130 days ago
Thanks jory927! It was a little scary, and embarrassing! Lol.

jory927 - 131 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 - 131 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. - 133 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 - 141 days ago
I'm only taking a multivitamin Prenatal pill. Would that help?

DerbyQueenDill - 142 days ago
daffymtz22: are you taking Vit B6 in addition to your prenatal?

daffymtz22 - 142 days ago
Not me. I feel so exhausted all the time. I don't want to complain though because I love being pregnant.

DerbyQueenDill - 145 days ago
Starting to get my energy back, how about anyone else?

lilgibber22 - 145 days ago
Yay for being in the 2nd trimester!!!

DerbyQueenDill - 149 days ago
Hello Week 13!

PaulaSoon2B8 - 183 days ago
There I fixed that, I just opened a new account :) - 183 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 :( - 186 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 :) - 188 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 - 190 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 - 190 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 - 190 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 - 191 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 - 191 days ago
I'll be wearing summer dresses, yoga capri pants, and sandals to get through the summer months of this pregnancy.

1morefor4 - 191 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 - 194 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 - 194 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 - 196 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 - 199 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

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Members in week 13:
  1. hannabelle - 09 Apr 2016
  2. AussieDanni84 - 10 Apr 2016
  3. TaylorsBunNo2 - 10 Apr 2016
  4. AussieDanni - 11 Apr 2016
  5. beegee - 13 Apr 2016
  6. cutedame - 13 Apr 2016
  7. Rissa1 - 13 Apr 2016
  8. Gcutie - 15 Apr 2016

The due date from members in week 13 is from Saturday 9 April 2016 up to & including Friday 15 April 2016. See the full timeline here

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