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4 Weeks Pregnant – What to Expect Your 4th Week of Pregnancy

It’s implantation time! Now no bigger than a poppy seed, though a whole lot sweeter, the ball of cells that will become your baby has completed its weeklong voyage down your fallopian tube and has claimed its berth in your uterus by tunneling into the sticky uterine lining. Nestled in your uterine home, this miniature miracle has established the cozy connection that will bind the two of you for the next eight plus months and forever after.

But that’s just the beginning of the action this week. In the works is the amniotic sac that your baby will call home sweet home. And at last! The sign you’ve been waiting for. Your little embryo starts to produce HCG, the just-for-pregnancy hormone that’ll turn your pregnancy pee test positively positive. You are officially expecting!

Though your embryo is only a tiny dot, it has already started to differentiate into three layers, each with its own job assignment. The inner layer, called the endoderm, will become the digestive system, the liver, pancreas, bladder, and thyroid gland.

The middle layer, the mesoderm, will grow into the heart, bones, kidneys, muscles, and blood vessels. The outer layer, called the ectoderm, will develop into the brain, nervous system, skin, hair, and eyes. It’s hard to believe, but by the end of your fourth week of pregnancy, all the building blocks for your baby’s vital organs are firmly in place.

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Paola Munoz
Paola Munoz
11 months ago

I just found out I’m pregnat 4 weeks 😭 my first baby

Angelina Rafael
Angelina Rafael
11 months ago

Found out I was 4 weeks pregnant and I just lost my baby in the following week 😔

ray ray
ray ray
11 months ago

I'm 4 weeks…is it normal to have brown thick mucus coming out?

B C
B C
11 months ago

I just ovulated yesterday!! Lol. fingers crossed tho 😩🤞🏽

Priyanka Shukla
Priyanka Shukla
10 months ago

Kya 4 week m jaan hota h plz reply as soon as possible

የውሎ ልጂ ደሤ ወግዲ ለሚ ልዩ ነሺ ለእኔ
የውሎ ልጂ ደሤ ወግዲ ለሚ ልዩ ነሺ ለእኔ
10 months ago

Tankse vry god

Hussain Malik
Hussain Malik
10 months ago

My wife got pregnant , we went for strip test first it was positive then we went for beta hsg but it was slightly high like 2700 and it was 4 weeks. Then we went for ultrasound doctor said its too early it was 5th week and she just saw gestational sac nothing else . My question is why beta hag was raised ? Does it mean twins ? Or 2700 beta hcg value is normal in 4 weeks ?

Yelenis Rodriguez
Yelenis Rodriguez
10 months ago

4 weeks pregnant with my first baby! 💓 soooo exited for this journey

Update: had a miscarriage at exactly 5 weeks 💔💔

aizha usman
aizha usman
10 months ago

4 weeks pregnant with my first baby we have been ttc for a whole year !!

23 Years Old of Gold
23 Years Old of Gold
10 months ago

I just found out today am 4weeks after 2 recurrent miscarriages in 2019. I hope this one makes iT.

_rkpdg
_rkpdg
10 months ago

I had a chemical pregnancy last month and had a terrible pain at around 4 weeks and 6 days with a lot of heavy bleeding so I know I lost it. My period is late which means I should be 4 weeks and 3 days today, but I‘m scared to test! 😢

soomi Shah
soomi Shah
10 months ago

I got my first baby ultrasound they it have a gestational sac but no fetus pole and heart beat m currently 4 week can any one plz tell what it mean

Aquamans Wife
Aquamans Wife
9 months ago

4 weeks 1 day with baby number 4 ❤️

Sida S
Sida S
9 months ago

I just got a positive today!

Dorotea Mangue
Dorotea Mangue
9 months ago

I found out I'm pregnant this Monday!!!

Chloe Grace
Chloe Grace
8 months ago

I have just found out I’m 4 weeks pregnant!!! 🥰🥰🥰🥰🥰

Nicole Todorov
Nicole Todorov
8 months ago

suddenly everyone in the comments is pregnant

C h r i s t i n a xoxo
C h r i s t i n a xoxo
8 months ago

I’m so nervous about this whole experience but excited at the same time. (Edit: ) I am actually 10 weeks and three days pregnant today) just saw my peanut today in the ultrasound he or she already looks like a full baby ! Amazing

Hayley Jay
Hayley Jay
8 months ago

4 weeks with my rainbow baby

Celine Davis
Celine Davis
8 months ago

My last period was in May 25th to may 30th and I had sex de 7th off June am I possible to get pregnant

Yvas Arts Official
Yvas Arts Official
8 months ago

I found out im having my 3rd child , and definitely unplanned , i took a plan b … and honestly i dont know how it didnt work , im regreting even meeting that man.. im not ready and i feel really broken rn, i already going through it with 2 trying to get stable..

Sonya Khatchigian
Sonya Khatchigian
8 months ago

I’m so nervous , my first pregnancy was a super early miscarriage at what would have been about 5 weeks … I’m now confirmed pregnant again and probably 4/5 and I’ve got similar cramps to the first time and worried I’m going to lose it again …. I’m 24 and super healthy if this happens again I’d have no idea how to feel and what to do … we got pregnant first go for first one and this one again, first go trying so I’m hoping my body can hold it …

Sofia Smith
Sofia Smith
7 months ago

Had my 2nd child late February this year and my cycle never got back to normal after that. I was with my significant other (father of my other 2 children) one time in June and I am pregnant AGAIN…. Its unfortunate because we wish we could be happy about it but we aren't. We didn't want more kids so soon and would have been ok with not having more. I know we risked it by having unprotected sex, but still I figured the odds were in our favor…. nope! So many couples try for months or even years before they conceive. Us, just once is enough. Our February baby was conceived by a one time only thing too but that was my fault. I thought day 11 was far enough away from ovulation. … Nope.

I've been cramping and bleeding for 9 days now and it's not getting better, if anything it's getting worse. I haven't seen my doctor yet but I will tomorrow hopefully. I'm wondering if something is wrong because I never had this much pain and bleeding with the other pregnancies. I had 3 false periods in March so they can't judge gestational age by my last period cuz that would not be accurate. In my case do doctors add 2 weeks from when I had sex? Or do they add 2 weeks from when implantation started?

Denisha English
Denisha English
7 months ago

Just found out today that I am pregnant with baby #2! Excited and scared due to having a miscarriage back in January. Praying this little bean sticks ❤️🤞🏽

Taj’s and Chris
Taj’s and Chris
7 months ago

4 weeks 2 days and I’m excited praying it’s my girl 🥰

Buttercupp 903
Buttercupp 903
7 months ago

Idk why but I feel I’m pregnant I feel weird I’m looking up all the sytom I’m over emotional and it’s crazy I hope I am pregnant I really want a baby

liberty lover
liberty lover
6 months ago

4 weeks in on my second pregnancy. With the first one I had implantation bleeding at 8 weeks. With this one I had implantation bleeding the week before I tested. Is it possible that I'm actually farther than 4 weeks? I thought my last period started July 4th but maybe that was implantation bleeding? I'm in a new city and with Coronavirus the process seems to have changed. They didn't want to see me until 10 weeks along until they found out the meds I am currently taking. Last night I felt a new sensation of brief pain that felt like something going down a tube. Was that the baby moving from my side to the center? Can't wait for my appointment. Last pregnancy they wanted to see me immediately and every two weeks.

Deedry K
Deedry K
6 months ago

Ahhhhhh omg I cant believe I’m watching these again, found out three days ago so scared but so excited 2 under two here we go

Destiny Williams
Destiny Williams
6 months ago

Has anyone found out at 2 weeks because i found out 2 weeks ago but tomorrow i make 4 weeks can someone please tell me how that's possible

RJ london
RJ london
6 months ago

Just found out I'm pregnant with my 3rd and last! Wishing you all happy and healthy pregnancies ❤

MsSense
MsSense
6 months ago

I’m 3 weeks 5 days! Found out 4 hours ago

Amy Krog
Amy Krog
5 months ago

Hoping the third time's the charm and that this little embryo becomes our rainbow baby 😭🌈

Chinita Babe
Chinita Babe
4 months ago

Wow I am 5 weeks now but may ovulated late so i may be 4 weeks. Theres no sac yet they can only see thickness of my uterine lining 15.3mm and corpus luteum cyst. I just feel sore breast and uterine cramps.

Carissa Williams
Carissa Williams
4 months ago

4 weeks 2 days!

A Southern N’ Country Kinda Girl
A Southern N’ Country Kinda Girl
4 months ago

How are people so lucky 😭

Its me
Its me
4 months ago

I took a digital clear blue pregnancy test today.
I found out i conceived 1-2 weeks ago.

Hey It’s Tay
Hey It’s Tay
4 months ago

4 weeks 3 days today 🥰 had one miscarriage two years ago so been trying ever since … please say a prayer for me that this one sticks 🤞🏽rainbow baby #1 #babydust

2 Train
2 Train
3 months ago

Here we go again

WoW Symergestic
WoW Symergestic
3 months ago

DO we need to be strict on what we eat at this stage? what are the best foods to eat for healthy results?

Mama Haze
Mama Haze
3 months ago

4 weeks today!

Treasure Ogechi
Treasure Ogechi
3 months ago

I am 4weeks pregnant, just found out today.. I'm so thankful to my lord Jesus Christ 💕💕

Yata Spencer
Yata Spencer
3 months ago

4 weeks and 6 days! GOD IS GOOD! Ladies it’s a process but you will GET YOUR SEED! Praying for you all!!! 🤰🏽🙌🏽❤️🤞🏽❤️

Mariam Akhtar
Mariam Akhtar
3 months ago

4 weeks and 1 day with baby number 2. So excited but nervous. Just want to hear the heart beat

Parves Sardar
Parves Sardar
2 months ago

my wife is 4 weeks and 5 days pregnant ❤️pray for us and our first baby

Denise Saenz
Denise Saenz
2 months ago

4 weeks and 5 days pregnant

syaliza nasir
syaliza nasir
2 months ago

Im 4 weeks and 4 days days pregnant..hope everything goes well for my first baby❤️

Kristinlee Macphail
Kristinlee Macphail
2 months ago

I have pregnancy symptoms but not taken a test yet as am too scared x

அமுத மொழி
அமுத மொழி
1 month ago

Thank you jesus..

Posted By Claire

Claire is our Community Manager here at New Moms Forum. A mom of two (almost grown-up babies), Claire has been building and operating community-based websites for almost 20 years. In her downtime, Claire enjoys spending time with her family and drinking copious amounts of red wine!

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