4 Weeks Pregnant | Symptoms and Your Baby

4 Weeks Pregnant | Symptoms and Your Baby

4 Weeks Pregnant

So, you’re 4 weeks pregnant. This is when you may first start to suspect you are pregnant. Perhaps that’s because your period hasn’t arrived! You may start to experience some symptoms of early pregnancy.

At 4 weeks pregnant, your egg is now well attached to the inside wall of your uterus. It’s sending out tiny little hair-like tendrils, which will wrap around the abundant small blood vessels in the lining of your uterus. This helps to provide oxygen and nutrients to your growing baby.

In normal circumstances, your blood and the blood of your baby do not mix. You both have a separate circulatory system. Exchange of oxygen, nutrients and waste products is made possible due to the closeness of your blood vessels to the blood vessels of the placenta. However, the placenta doesn’t start to take over until around week 10.

Implantation bleeding may occur for some women, resulting in some spotting at around 10 to 14 days after conception. Some women may think they are starting to get their period, however implantation bleeding is very light and lasts only a day or two.

If you have an indoor cat, you may be wondering about toxoplasmosis — or perhaps you’ve not yet heard of it. It’s best to have your partner to change the kitty litter while pregnant due to a parasite which is found in some cats’ faeces. But don’t panic, as long as you don’t touch (or ingest – yeah, gross!) cat faeces you’ll be fine.

4 Weeks Pregnant – Symptoms

According to BellyBelly forum members, here are some symptoms they experienced when 4 weeks pregnant. Please note that everyone is different and you may have some, all or none of these at this stage of pregnancy:

  • Nausea
  • Heartburn
  • Frequent trips to the loo
  • Constipation
  • Occasional backache / lower backache
  • Extreme fatigue
  • Hot flashes
  • Shortness of breath
  • Over emotional (lots of crying!!)
  • Sore breasts/sore nipples
  • Light headedness
  • Sensitivity to smells
  • Things taste “different”
  • Feeling completely normal

See more weeks and symptoms in our pregnancy forums.

4 Weeks Pregnant – Your Baby

At 4 weeks pregnant, your baby is now classed as an ‘embryo’.

The embryo’s heart and primitive circulatory system rapidly form. The neural tube also begins to form. The neural tube will develop into the nervous system, consisting of the brain, spinal cord, hair and skin. This is a very good reason to up your dietary intake of folate (known as folic acid in synthetic form). Folic acid is usually found in pregnancy supplements. It helps the neural tube develop and prevents a major birth defect, spina bifida, from occurring by around 70%.

It’s important to note that 1 in 4 people will have problems converting synthetic folate (folic acid) in the body. A MTHFR gene mutation affects 1 in 4 people seriously and 1 in 2 mildly. One form of the mutation results in a 40% to 60% decreased ability to produce the body’s most active form of folate. The best supplement to take instead of folic acid is folinic acid, especially if you’ve had problems with fertility, pregnancy complications or miscarriage. A simple test for MTHFR may give you some answers, so don’t hesitate to ask your doctor.

Of course, just like with any nutrient or vitamin, try and source as much of your folate needs from natural food sources as you can.

Helpful Articles At 4 Weeks Pregnant

Here are some articles which may be helpful if you’re 4 weeks pregnant:

Are you 4 weeks pregnant? Share your thoughts and experiences in the comments section below.

Last Updated: June 29, 2015


Kelly Winder is the creator of BellyBelly.com.au, a doula, writer and mother to three awesome children. Currently, she's travelling the world for 12 months with her partner and children, and hopes to inspire more families to do the same. Visit aroundtheworldpluskids.com.au for more information.