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Pregnancy comes with a whirl of emotions that can sometimes be quite overwhelming. Especially if this is your first pregnancy, the entire experience is totally new, and not knowing what to expect can make you quite anxious. To help you gain some perspective and have a better idea of what happens during each stage of your pregnancy, we’ve compiled a series of pregnancy week by week symptoms, tips, and info to give you a better idea. In this article, we’ll be discussing your pregnancy at 4 weeks.
4-week pregnant symptoms

Via: Emma’s Diary
Your pregnancy symptoms at 4 weeks are quite similar to your PMS symptoms. But here are a few 4-week pregnancy signs to keep an eye out for:
- Sore breasts
- fatigue
- Frequent urination
- An intense sense of smell and taste
- Nausea
- Food cravings
- Possible spotting or light bleeding
- Missed period
- Thicker and shinier hair
4-week pregnancy belly

Via: Baby List
While you won’t notice any changes in your belly at 4 weeks, during weeks 4-5 of your pregnancy, the embryo develops within the lining of the womb. Your embryo is about the size of a poppy seed and is about 2 mm long. During this stage, the outer cells form links to be able to reach the mother’s blood supply. At the same time, the inner cells merge to create two layers at first and later become three layers.
These layers grow and develop to become different parts of the baby’s body:
- The inner layer formed grows into the baby’s breathing and digestive system.
- The middle layer forms the heart, blood vessels, muscle, and bones.
- The outer layer grows into the brain and nervous system as well as eye lenses, tooth enamel, skin and nails.
Pregnancy checklist at 4-weeks pregnant
At 4 weeks, you will be able to know you’re pregnant already and this is when you can start doing the following:
- Choose your OB and make your first appointment
- Start taking prenatal vitamins
- Excercise to ease pregnancy symptoms
- Eat healthy food
Further reading:
- Top 10 Stretch Mark Creams For Pregnancy
- Swelling During Pregnancy: When to Worry
- 9 Best Pregnancy and Baby Apps
Sources used in this article:
- 4 Weeks Pregnant: Symptoms, Tips, and More – Healthline
- You and your baby at 4 weeks pregnant – NHS
- Week-by-week guide to pregnancy – NHS
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