Period Trackai

Published 01 September 2025 | Written by Dr. James Carter

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The brain undergoes a growth spurt, enhancing reflexes. The fetus is about 13 inches long. Talk to your doctor about labor signs.

Week 9 - Fetal Movement Starts

Week 11 - Gender Differentiation

Week 18 - Hearing Develops

Week 31 - Bone Strengthening

Week 5 - Heartbeat Begins

Week 3 - Germ Layer Formation

Week 17 - Fat Layers Develop

Week 27 - End of Second Trimester