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Week by Week Pregnancy Calendar

Fetal development pregnancy calendar week by week format taking you through the development of your baby during the course of the next nine months of your pregnancy.

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Week by Week Pregnancy Calendar


Our week by week pregnancy calendar will show you stages of embryo fetal development for your current week of pregnancy week by week. Our stages of pregnancy calculator will display which week and trimester you are currently in.


Pregnancy Week : 4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41 

View fetal development by pregnancy trimester stages


Week 4 fetal development


Pregnancy Calendar Week 4Pregnancy Calendar Week 4
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Boy or Girl ? - Find out Today
You're at your first trimester

The fertilized egg will implant in your uterus this week. This egg is called a blastocyst and it measures 0.1-0.2 mm in diameter. The sex and other characteristics of your baby have already been determined.



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"Thanks for the awesome result! I used your online baby gender predictor and the result was a Boy. Few weeks later, our scan confirmed that we are having a baby Boy. We are excited and very happy! I will recommend your site to everyone."
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Fortune Baby Gender Predictor Reviews


Thousands of happy moms around the world successfully used Fortunebaby gender prediction test. We are delighted to share their gender prediction reviews about their experience with Fortune Baby.

Just wanted to send an e-mail - to let you know that your gender predictors were correct. I still have a hard time believing it's true that I am having a girl after having three beautiful blonde haired boys ages 4, 2, and 1. When my prediction last month from Fortune Baby said I was having a girl - I was hopeful but thought in the back of my mind that this baby will probably be a boy as well. That would have been fine since all anyone can really ask for is a healthy child. Although, I have always longed for a daughter and knew this pregnancy would be my last since I just turned 37. So - I found out this week at my 18 week ultrasound that I am in fact having a baby girl. I am giddy and totally over the moon. This is the best birthday present I could ever ask for. Thank you so much Fortune Baby! I feel so completely blessed and happy!

After taking your gender predictor test and finding out I was having a boy, I was very excited. Couple of months later when I got the ultrasound, the doctors told me it was a girl. One month later, they told me that it was a mistake and I was really having a boy. Your gender prediction test was accurate from the beginning. Thank you very much.

I wanted to thank you for the prediction. I knew I was going to have a boy, I told everyone. But your gender predictor said girl. Didn't think anything of it....until last week. At my ultrasound, the tech told me I will have a girl! I was stunned and remembered what fortune baby told me. You were right and I was wrong! Thanks again and will definitely come back to the site when we are ready to make a boy.

I did the test when I first found out I was pregnant. At ten weeks, my MD told me I was having a girl when the test said IT'S A BOY! I was upset a little because I have two girls and I wanted this to be my last pregnancy and I was dreaming of a boy for my husband. Well, at my check-up at 18 weeks, the ultrasound tech and the MD confirmed that I am indeed having a BOY just as the test stated!! You guys were right and have been right with my other two daughters as well--that's 100% accurate for me.

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