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.
mandykat760 - 18.6 hours ago
Babylove, take advantage of it while you can. I get the urge to start big projects while pregnant. With my second I restrained all of the woodwork in the house, including the kitchen! Haha
babylove5 - 2 days ago
Does anyone else feel like they are nesting the entire pregnancy? I have a strong desire to get rid of clothes, nick knacks, and pretty much anything that is taking up unnecessary space. I have donated 13 bags of clothes to goodwill. I love clearing stuff out.
babylove5 - 3 days ago
Last week in the first trimester!!! Yay I can't wait to be rid of my nausea!
floydianslip2 - 3 days ago
Well, I’m feeling much better. My cold is gone, just a little bit of congestion left but nothing too unmanageable. Such a relief! I’m not sure if it’s from having that nasty cold or not, but for the last few days I’ve been so out of breath… Moving laundry from the washer to the dryer had me huffing and puffing like crazy, it’s weird!
BethQ - 4 days ago
Amazing what a week will do for a pregnant body! I'm definitely starting to feel better, and boy, is baby letting me know it! Cravings like crazy this week! Nothing consistent yet, but I think I'm just more hungry in general because I'm not as nauseous. Finally told our families and made it Facebook official. Midwife appointment on Friday. Looking forward to it. :)
klawest2 - 4 days ago
Feeling a bit cramps tonight :/ it was a biiiig day though. Threw a party for my daughters second birthday this afternoon and was just busy getting ready and on my feet most of the day. Good day but I'm tired!
mommylh - 6 days ago
I'm feeling for you. I've been sick twice already this pregnancy. It's awful because you already feel down from being pregnant, you can't just take a day or what not because you have other kids and responsibilities, and the whole pregnancy thing I swear heightens the illness and it takes that much longer to get over. Feel better soon
klawest2 - 7 days ago
Floydianslip, that was me last week! I always feel like outside of not bein able to take anything, pregnancy itself always heightens my sickness or makes it linger :(
floydianslip2 - 8 days ago
What a way to start my 13th week. I'm in bed with the worst head cold I've ever had. It's so awful to be sick and not be able to take anything for it that actually works. :( On another note my morning sickness is gone!
elequin - 12 days ago
1sttimemomma I've had stupid dreams too. I had an emotional affair with an afl footy player in one where I didn't even speak to him, there were just lots of deep meaningful looks...
I had one two days ago where I dreamt my daughters ear nose and throat dr performed an op on me and removed part of my intestines... And then in the dream I went through morphine withdrawal...
All sorts of craziness.
alismom2 - 14 days ago
i feel movement too ppl act like im crazy....im glad someone else feels something i didn't feel anything till like 20 weeks with my daughter so this is excited for me too!!
1st.time.momma - 15 days ago
Dec baby- ya they are pretty strong. Not always regular but gets me so excited for more. My husband is pretty jealous. (Its his first) ive tried to hurry and have him feel cause I figured if i could feel it that one time then why wouldnt he but hes always too slow and misses it. Lol guess he'll have to wait til my belly is more poking out and you can see the baby kicking not just feel. Hope everyones having a great day! So far im a bit tired but still not as bad as a few weeks ago. Heading to 14 weeks tomorrow so excited!
Dec Baby - 15 days ago
1st time momma...yay for feeling movement! I think I've felt a few little wriggles and taps from the baby too...they are so slight though, so I'm not 100% convinced, but if the same kinda movement gets stronger then I'll know it's the baby:))
Elequin...that is so sad about the missing boy, the trauma those poor parents and relatives must be going through...aww dreadful:(
Oh yes, I don't think we can be too protective of our little ones! That is our job as parents to make sure they are kept safe:))
elequin - 16 days ago
This isn't preg related really, but for the last 4 days it's been all over the news re a little 3 yr old boy missing, feared abducted. I'm a worrier anyway, but what with the hormones, I sometimes feel on the verge of crying with anxiety about my own kids safety, aged 3 and almost 2.
I started training my daughter about who it was safe to 'go' with or talk to this morning. It scares the hell out of me.
I saw someone post earlier on here re doubts about pregnancy... My hubby and I talked about this last night, that 3 kids is definitely enough for us because we worry that we wouldn't be able to keep an eye on them properly.
I plan on being that mum that always has her kids' friends over at her house, rather than letting her kids go off to other ppl's houses that haven't been checked out.
It sounds paranoid I know, but as an ex cop, what limited stuff I've seen re sex offenders, child porn, etc, is still enough to make me mistrust everyone :/
Feeling anxious and praying for this poor little boy's family. His name if anyone wants to google or pray for them as well, is William Tyrell.
1st.time.momma - 17 days ago
Well exciting news. I felt baby move for the first time on thursday! Not like oh I feel the flutters like I felt baby full on roll and when I pushed down on my belly I felt it again. Such an awesome feeling. Now on another not. I had a terrible nightmare last night, I had a miscarriage and I saw pieces of one baby in toilet and full baby still moving and trying to survive. I woke up freaking out and dreading to use the bathroom. So glad it was just a dream!!
elequin - 18 days ago
Hi dec baby,
I've been exactly the same with energy, and have been a lot better, but some days could still Just sleep forever. Although just thrilled that its coming back a bit tbh.
Moving to wk 13 today, and get a quick follow up ultrasound as well :) yay!
Have no idea all of a sudden if bub is a boy or girl anymore. Arggggg!
I'm in the last week for the term of teaching, and after this I get 4 weeks off... Cannot wait! Looking fwd to starting my nursery soon and getting my other kids' bunk room sorted properly :) time is moving by!
Dec Baby - 18 days ago
It is pretty quiet in week 13...I'm kinda jumping around the weeks posting here and there!
I'm starting to feel like my energy is returning, although it comes in waves! Some days are great and other days I wish I could spend the whole day in bed...so not possible with 2 little one to take care of:)) On another note, I had heart burn the other night and was shocked to get it this early, usually I experience this in the last trimester! I hope it was a random one off and stays away... So not nice:/
email@example.com - 19 days ago
I know it's always so quiet in here. Every time I go to a new week it seems like I'm all alone
1st.time.momma - 21 days ago
Yay new week. Why is everyone so freaking quiet? Its sad!
1st.time.momma - 22 days ago
Hi all...ive been getting a few messages saying yall cant find the fb page. Message me your email address or go to www.facebook.com/groups/IAP2015/
1st.time.momma - 25 days ago
I know some moms couldnt find the fb iap page so I created one. I-A-P 2015 MOMMIES...if you cant find it message me your email and ill add you
klawest2 - 29 days ago
I created a Facebook group for all IAP mamas who are due in 2015 :) search 'IAP 2015' and request to be added! I was a part of the IAP 2012 Facebook group and still keep up with lots of the mamas I met there!
lynt - 30 days 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 - 35 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 - 37 days ago
I posted my ultrasound from today heartbeat is 164 what do u think boy or girl?
brandyleigh - 38 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 - 40 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 - 41 days ago
Hello week 13! So crazy to already be almost in the middle of the second row of numbers!!
LiLBean5 - 44 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 Erin.firstname.lastname@example.org the original admin puts everyone as admin so we can add new ppl. :)
LiLBean5 - 44 days ago
Hi mommyluv it's great to see you here! I hope everything gets better as it's the 2nd trimester now!!
MommyLuv2 - 44 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 - 47 days ago
Room4onemore, I just got your email and emailed you back :)
room4onemore - 47 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 - 47 days ago
Rainbow baby I emailed to join the secret group!!!
rainbowbaby2 - 48 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 Erin.email@example.com the original admin puts everyone as admin so we can add new ppl.
cutezilootz02 - 51 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 - 54 days ago
Timefor2 thanx...will discuss with my gynea...I am having my 3rd cs in 4 yrs...have to do something...am told any other pg is very high risk.
Timefor2 - 56 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 - 56 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 - 57 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 - 62 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 - 62 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 - 62 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 - 62 days ago
cutey24u...oh ok.. well thats awesome.. let us know how u got on asap
cutey24u - 63 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 - 64 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 - 64 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 - 65 days ago
cutey24u... u can find gender via blood test?
konepich - 65 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.
The due date from members in week 13 is from Friday 3 April 2015 up to & including Thursday 9 April 2015. See the full timeline here
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