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Weekly Pregnancy Guide - Week 5
Weight: <0.1oz <1g
Length: <0.01" 0.3mm
Heart rate : N/A N/A
Your baby now has three layers (outer, middle and inner), and each layer will develop into different parts of the body.
It also becomes more pear-shaped, with the head region broader than the tail end.
A neural groove also develops along the axis, and is the precursor of the nervous system.
The heart and primitive circulatory system is also rapidly forming.
Cell differentiation accelerates as it develops more bumps and ridges, including a head fold on either side of the primitive streak.
You're probably noticing that your period is late.
If you haven't already, you may begin to have pregnancy symptoms. Your breasts will become swollen and tender as milk glands multiply; you may need to use the bathroom more frequently as the growing uterus presses on your bladder; you may feel nauseated from "morning sickness" and experience headaches caused by rising hormones; you may feel hungry more often as your body now requires energy for two people.
The infamous "morning sickness" affects about 70% of all pregnant women, and doesn't only occur in the morning. Good thing is, it usually goes away by Week 13.


Week 5 Fetus Picture(s):

week 4 embryo blastocyst

week 4 embryo blastocyst

Week 5 pregnant belly picture:

week 2 - pregnant belly


General Introduction to Pregnancy
Your Changing Body + Pregnancy
Your Baby’s Development
Potential Pregnancy Complications
Labor and Delivery
View all 
General Introduction to Parenting
Child Nutrition
Childcare and Education
Sleep in the Early Years
Baby Milestones
View all 


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