What Your Baby Really Looks Like This Week — A Complete Week-by-Week Guide
Pregnancy is one of the most extraordinary journeys of life — from a tiny cluster of cells to a fully formed baby ready to be born. Every week, your baby changes in incredible ways. Below is a detailed, medically updated week-by-week guide to what your baby looks like inside the womb — from fertilization all the way to full term. 🌱 First Trimester (Weeks 1–12): From Fertilization to Tiny Human Weeks 1–3: Conception Begins Week 1–2: You aren’t technically pregnant yet — this counts from your last menstrual period. Week 3: Fertilization occurs — a sperm and egg join to form a zygote . It begins dividing into many cells as it travels down to implant in the uterus. Mayo Clinic Weeks 4–5: Embryo Takes Shape Week 4: The embryo implants in the uterine lining. You might see the gestational sac on ultrasound. Week 5: The embryo is only a few millimeters long, with a tiny heart beginning to beat and initial brain and spinal cord forming. Mayo Clinic +1 Weeks 6–7: Early Feature...