Your Pregnancy at Week 4

Your Pregnancy at Week 4

Implantation is happening!

Week 04

your baby this week:

During week 4, implantation occurs. This happens around 6-12 days after conception and may be indicated by a little spotting (light bleeding), as the blastocyst buries itself and attaches to your uterine wall - easy to mistake for the start of your next period.

Depending on the number of days in your monthly cycle, you likely conceived around 2 weeks ago, and your tiny human is currently no bigger than the tip of a needle! Yet, in nine months' time, your gorgeous baby will fill a baby grow - how cool is that!

This little pinhead-sized ball of cells is growing at an unbelievable rate, and the fertilised egg is dividing over. The little embryo also splits in two, half forming your little one, and the other becomes the placenta. Your amniotic sac is beginning to form, as is the little yolk sac your baby will live in during its stay.

Your little blob has three layers, each beginning to grow into different parts of the body. The 'endoderm', which is the inner layer, starts to grow your baby's digestive system, as well as their liver and lungs. The middle layer, which is called the 'mesoderm', soon becomes the heart, bones, sex organs, kidneys, and muscles. Finally, the 'ectoderm', which is the outer layer which starts to transform into your baby's central nervous system, nails, hair, skin, and eyes.

As the baby's blood vessels start to form, their blood is now beginning to circulate and help with the development of their tiny heart. For the next few weeks, your baby is an 'embryo', and takes all the nourishment it needs from the yolk sac. Once you are around 12 to 14-weeks pregnant, the placenta will be fully formed and ready to take over all the hard work. This is when you'll start to feel more normal.

your body:

How are you feeling? The likelihood is you will feel normal as pregnancy symptoms don't tend to rear their heads for a few weeks yet. But there are certainly some tell-tale signs for many women which we covered in 'Early Pregnancy Symptoms'. So, sit back, take a big breath, and relax as your body does all the hard work!

Oh, and congratulations!

Stay with us and we will take you step by step through your pregnancy with a weekly update on what your tiny human is up to! If you've not been taking preconception vitamins, it's time to stock up on folic acid as the next few weeks are the most crucial to baby's development.

Louise Broadbridge - Our Expert Midwife

Hi, my name is Louise, I am a Registered Midwife, founder of Let's Talk Birth and Baby and the face behind Instagram's The Honest Midwife. I have worked in health settings for the past 30 years, the majority of which have been working in children and family settings.

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your tips & to do's:

Tell your partner you're pregnant.

If you're not already, start taking a prenatal vitamin with at least 400 micrograms of folic acid, and remember to take it daily because it's proven to help prevent birth defects.

Select your midwife, doula, or OB doctor and make your first prenatal appointment.

Begin the habit of going to bed early and napping when you can. Most women feel more worn out than they've ever felt before, and this is a great way to combat that fatigue.

Who knew we'd ever find cause to celebrate the rising number on a scale? Okay, maybe you aren't celebrating per say, but it is perhaps the one time in your life you should consider documenting your weight gain. Get creative! Give your baby book the perfect start with a record of your ever-expanding baby bump. Some of the best ways to document and gauge your growth include:

  • Taking a profile picture each week. Use a small marker or poster board as a sign to hold, naming the week, to help you more easily distinguish between weeks. Make this photo record even more dramatic by taking pictures in the same location each week, perhaps framed by a doorway for visual reference to your changing waistline. If you're thinking weekly photo shoots aren't your cup of tea, one-a-month photos work, too!
  • Using written word! As often as you think it, document each little landmark of gestation in a journal, like when you make the switch to maternity clothing, or your belly button no longer claims its allegiance to the "innie" club, or your partner is at the helm of all leg shaving. These moments seem unforgettable, but in years to come, you'll treasure these tiny details.
  • Wrapping ribbon around your waist. Go to your local craft store and purchase a bag of baby-related (or any theme) charms. Each month, tie a charm at the precise point where it meets. As the charms accumulate, you'll have a tangible, charming reminder of this journey.

No matter how you choose to document your growing belly, make sure you relish in the amazing changes that are taking place inside of you. Remember, each pound is helping to nourish and sustain that little life inside.

your symptoms

Many women don’t feel the symptoms of pregnancy during week four. However, about 50 percent of women will experience pregnancy symptoms during week five, and most women will notice symptoms around week six. If you are already experiencing pregnancy symptoms, they may include:

  • A positive home pregnancy test, or positive blood pregnancy test
  • Spotting
  • Tender or swollen breasts
  • Mood swings
  • Morning sickness
  • Cramping
  • Fatigue
  • Gas and bloating

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Articles shown are a mixture of informative pieces, anecdotal accounts and professional advice from our panel of Bloggers, Writers and Experts. The views and opinions expressed in these articles are those of the authors and do not necessarily reflect the official view of this site.