Pregnancy Week by Week
Your baby grows from a poppy seed to a pumpkin in forty weeks. This timeline tracks every milestone — what your baby looks like, what is happening inside your body, and what to expect at each stage of your pregnancy.
Week by week
First Trimester (Weeks 1–12)
Second Trimester (Weeks 13–26)
Week 4 of Pregnancy: A Poppy Seed, and the Week You'd Notice Something
Week 4 is when the embryo is about the size of a poppy seed, hCG starts rising, and — for many trying to conceive — the first real physical signal arrives.
Week 3 of Pregnancy: Fertilisation and the Two-Week Wait Begins
Week 3 is when fertilisation and implantation actually happen — and when the two-week wait quietly begins. Here's what's really going on in your body.
Week 2 of Pregnancy: Your Fertile Window Opens (Still Not Pregnant Yet)
Week 2 is when ovulation actually happens, even though the pregnancy dating calendar still says you're not pregnant yet. Here's what's really going on.
Week 1 of Pregnancy: What's Really Happening (You're Not Pregnant Yet)
Week 1 is confusing — you're not actually pregnant yet. Here's what's really happening this week, and how we approached it during our own TTC journey.