Week 16: Your Baby is the Size of an Avocado
You may feel the first fluttery movements (quickening), especially if this is your second or subsequent pregnancy. Your uterus is about halfway between your pubic bone and navel. You might notice a dark line (linea nigra) forming down the centre of your belly.
Your baby at week 16
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Size of a Avocado
Baby Development
The baby's eyes are becoming sensitive to light, even though the eyelids are still fused shut. Toenails are starting to grow. The musculoskeletal system is maturing, and movements are becoming more coordinated. The circulatory system and urinary tract are fully functional - the baby swallows amniotic fluid and urinates it back out.
Week 16 Highlight: Some mums feel their baby's first movements this week - often described as bubbles, butterflies, or popcorn popping!
Common Symptoms
Tips for Week 16
Moisturise your growing belly, hips, and breasts to ease itching.
Practice good posture to reduce back pain.
Write things down if pregnancy brain is affecting you.
Start researching childcare options and costs.
South Africa Specific Info
Second trimester antenatal visits in the public sector are usually scheduled monthly. At each visit, your blood pressure, urine, and fundal height will be checked. Weight monitoring and foetal heartbeat checks with a Doppler are standard. Make sure your antenatal card is up to date and bring it to every appointment.
All Pregnancy Weeks
Frequently Asked Questions
About the Author
Due Date Calculator SA Editorial Team
Our content is reviewed by healthcare professionals familiar with South African maternal health practices. We combine evidence-based medical information with local knowledge to support South African mums throughout their pregnancy journey. Our team includes contributors with backgrounds in midwifery, obstetrics, and maternal health education.
Last reviewed: February 2026