First Trimester of Pregnancy (Week 1–Week 12) - StoryMD
By A Mystery Man Writer
Description
During the first trimester your body undergoes many changes. Hormonal changes affect almost every organ system in your body. These changes can trigger symptoms even in the very first weeks of pregnancy.
First Trimester: Week By Week Breakdown — BRE SHEPPARD
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://www.mayoclinic.org/-/media/kcms/gbs/patient-consumer/images/2013/08/26/10/18/pr00112_im04610_mcdc7_fetal_development_week8thu_jpg.png)
Fetal development: The 1st trimester - Mayo Clinic
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://cdn.storymd.com/optimized/aARL3KUvdz/original.jpg)
The First Trimester of Pregnancy: What to Expect Week-by-Week - StoryMD
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://www.mayoclinic.org/-/media/kcms/gbs/patient-consumer/images/2013/08/26/11/02/pr00112_im04047_mcdc7_fetal_development_week3thu_jpg.png)
Fetal development: The 1st trimester - Mayo Clinic
End of 1st Trimester, 12 or 13 Weeks? - 1st Pregnancy, Forums
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://www.familyeducation.com/sites/default/files/styles/hub_content_feed_style/public/pregnancy_day/2010_06/ddpb13711wee_002.jpg?itok=IltXpfL6)
First Trimester, First Signs of Pregnancy, Early Pregnancy - FamilyEducation
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://images.ctfassets.net/3shtzlb7cz90/3F90B5vy4LzNjHqdRs3mRv/4024cc55021df09f6fc0ec0488bc5808/UK_Pregnancy_Calendar_Trimesters_01_720.jpg?fm=webp&q=70)
First Trimester of Pregnancy
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://images.ctfassets.net/9wtva4vhlgxb/1wDkMOooI1pJH6tKlH1FXI/6121efc0fd58147fcb1f3923ece2b612/US_Pregnancy_Calendar_Trimester_01_SP_20230920.jpg)
First Trimester: Symptoms and Baby Development
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://cdn.storymd.com/optimized/yOoYvXiMdG/thumbnail.webp)
Stages of Pregnancy - StoryMD
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://cdn.storymd.com/optimized/JdPz8BFjA3/original.jpg)
Second Trimester (Week 13 to Week 28) - StoryMD
![First Trimester of Pregnancy (Week 1–Week 12) - StoryMD](https://static.thebump.com/tb-web-assets/pwbw/detail/mobile/Week-1.png)
Baby and You at 1 Week Pregnant: Symptoms and Development
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