Pregnancy week by week

Pick a week to see your baby's development, changes in your body and what to do next.

First trimester

2Ovulation and the Egg's Journey3Fertilization and Early Cell Division4Implantation and the Three Germ Layers5Your Baby Is the Size of a Sesame Seed6The size of a lentil, and a heartbeat that may show on ultrasound7The size of a blueberry, with tiny arms and legs beginning to form8Your Embryo Is About the Size of a Raspberry9Your Baby Is About the Size of a Grape10Your Baby Is Now a Fetus11The baby is about the size of a Brussels sprout12The Baby Is the Size of a Lime and Practicing Swallowing and Sucking13Your baby is about the size of a pea pod

Second

14The size of a lemon: the baby begins to develop unique fingerprints15Baby Is About the Size of an Apple16Eyes Move Into Place and May Begin Responding to Light17Your Baby's Skeleton Begins to Harden18The Size of an Artichoke and Your Baby's Hearing19Your Baby Is Getting a Protective Coating Called Vernix20Halfway Through Pregnancy, About the Size of a Banana21Your Baby's Taste Buds Are Developing22Touch Is Developing, and the Baby May Touch Its Face and Umbilical Cord23Baby's Lungs Practice Breathing Movements24Baby's Lungs Begin Making Surfactant25Spine Strengthens and Fists Begin to Clench26The size of a zucchini: the baby may open its eyes for the first time, and they often look blue27Your Baby's Brain Is Forming Folds and Cortex

Third

28Your baby's sleep-wake cycles are developing29Your Baby Is Building Fat Under the Skin30Baby is about the size of a large cabbage31How your baby's senses are developing32Baby is about the size of a pomelo33Baby is about the size of a cantaloupe34Baby is about the size of a butternut squash35Baby is about the size of a honeydew melon36Baby is about the size of romaine lettuce37Baby is early term and ready for birth38Why Your Baby May Move Less39How the placenta changes and when to call your provider40Your due date is here, and baby is ready to meet you