Week 4 of Pre-conception
Discover what happens during week 4 of pre-conception. Baby development, body changes, symptoms, and a weekly checklist.
What's Happening This Week
The First Trimester ushers in a seawave of biological advances for both the mother and the baby. While hormones go on a roller coaster ride, your body is unable to tell if you are pregnant yet. Therefore, these couple of weeks shall test your patience. But there is nothing to worry about, as some thrilling, breathtaking, good news is certain to lighten you up quite soon.
Pre-conception is a time of rapid change — for both you and your baby. Every pregnancy is unique, and the information below will help you understand what's happening and how to prepare for the weeks ahead.

Your Body
Early signs may show up — fatigue, tenderness, mood changes. A lot is happening beneath the surface, even if the outside looks the same.
Your Baby
Still tiny — about the size of a pinhead — but already organising. Early structures begin forming that will soon become the heart, brain, and body.

Your Week 4 Checklist
Each week brings new things to prepare for. Here's what expecting parents during week 4 typically track in the BabySteps Companion app. Items are sorted by priority so you can focus on what matters most.