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5 Weeks Pregnant: Week-by-Week Guide
4 mins read


IN THIS ARTICLE – At this stage of your journey, new developments are beginning to unfold. Check out this week-by-week guide to find out what’s in store for your baby and your body in week 5 of pregnancy.


Your baby at 5 weeks pregnant | Week 5 pregnancy symptoms | 3 expert tips for a healthy and safe pregnancy | Week 5 checklist: How to plan your pregnancy



  • 5 weeks pregnant is which trimester? First trimester
  • How many weeks of pregnancy are left? 35 weeks
  • 5 weeks pregnant is how many months? You’re beginning your second month

With week 4 of your pregnancy complete, you’re on week 5. Enjoy it, as week 6 is on the horizon! 

One of the most exciting things about pregnancy is how many changes you’ll experience with your little one over the span of just 7 days! Here’s some tips and tricks to keep on top of all that’s happening.

Your baby at 5 weeks pregnant

What's happening in there

  • Your baby is the size of an citrus seed.
  • You’re into the first trimester.
  • The countdown continues: you’ve got 35 weeks to go!

What happens during the 5th week of pregnancy?

  • You missed something: If you haven’t already noticed, you may be late with your period. It’s time to head to the pharmacy or shops and pick up a test kit.
  • Hello hormones: You’re starting to get the first hormonal effects, whether they’re sore breasts, fatigue or that dreaded nausea you’ve heard so much about.
  • Baby's forming: The placenta’s under construction and in a position to start providing nourishment to your little creation.
  • Little layers of wonder: This week, the embryo divides into three layers called germ layers. The outer one will become the brain and nervous system, skin, eyes, ears, and hair; the inner layer will form the lungs, intestines, bladder, and liver; and the middle layer will become the circulatory system, reproductive system, kidneys, cartilage, muscles, and bones. A healthy diet will nourish your baby’s growth, complemented with a prenatal vitamin that has DHA to fuel brain development.

What should I be feeling at 5 weeks pregnant?

  • Don’t expect to suddenly blow up like a balloon. This early, you’ll see little change to your tummy and if you have particularly bad morning sickness, you might even lose weight.
  • Your breasts will begin to ache.

How big is your baby at 5 weeks pregnant?

 5 Weeks Pregnant

Baby Weight

Too tiny to weigh

Baby Length

Super small

Baby Size

Comparable to a citrus seed


Week 5 pregnancy symptoms

During week 5 of pregnancy, your body is changing quickly. As your baby grows, you will too, and there are certain pregnancy symptoms you may experience at this time.

4 common week 5 pregnancy symptoms

  • You’ll go through unusual cravings or just desire more of the things you like.
  • Your mouth may be tending to produce excessive saliva.
  • You will be fatigued.
  • If you don’t already have it, you’re likely to be feeling the effects of morning sickness very soon.


3 expert tips for a healthy and safe pregnancy

Being 5 weeks pregnant is an important time for you and your baby. Here’s some more expert-recommended advice on how to adjust to this new stage and keep you and your baby safe.

  1. Getting enough protein: Protein is important for your baby’s development, particularly your little one’s brain. Make sure to get three servings of protein every day, which is equivalent to about 75 grams.
  2. It's time to make a prenatal appointment: Your doctor can screen you and your baby for any health risks and make sure you’re doing everything you can to nourish the life growing inside you. Check with your doctor about any medications that you’re taking. Some might be OK, but others could be harmful to your baby and cause serious birth defects or miscarriage.
  3. Morning sickness doesn't stick to any clock: Expect to feel symptoms at any time of the day—so here are some tips to help provide some relief over the next few weeks.

Week 5 checklist: How to plan your pregnancy

Knowing what to do week-by-week can help you feel prepared and alleviate stress. Add these new items to your to-do list this week. You’ve got this, mama!

To-Do Checklist
Make sure to get enough nutrients (folate, iron, calcium, protein, vitamin C & D)
Discuss an ideal pregnancy weight with your doctor
Book a prenatal appointment


Learn more about your pregnancy, including pregnancy planning and pregnancy nutrition to feel prepared to continue this magical adventure. You’re armed with the facts, what to do, and now you can take time to connect with the little one growing inside you.

With week 4 in the rearview mirror and week 5 going strong, look to the future and what's coming up in week 6!

Join Enfamil Family Beginnings

It’s your 5th week of pregnancy, and you and your baby are experiencing exciting changes every day. Prepare for your new arrival with help from Enfamil Family Beginnings. It’s the perfect resource for new and expecting moms. Save on Enfamil products, track your bump and baby’s growth, and get helpful articles each week relevant to your journey. Join now for up to $400 in free gifts.

All information on Enfamil, including but not limited to information about health, medical conditions, and nutrition, is intended for your general knowledge and is not a substitute for a healthcare professional's medical identification, advice, or management for specific medical conditions. You should seek medical care and consult your doctor or pediatrician for any specific health or nutrition issues. Never disregard professional medical advice or delay seeking medical treatment, care, or help because of information you have read on Enfamil.