Pregnancy Week-by-Week Journey

The fertilised egg has implanted in the uterus. The placenta and amniotic sac begin to form. Most home pregnancy tests turn positive around now.

The early heart tube starts to beat. Major organ systems begin developing. Morning sickness can start.

The neural tube closes. Tiny limb buds appear. A heartbeat is often visible on early ultrasound.

Fingers and toes are forming. The first prenatal appointment is typically scheduled this week or the next.

All major organs are in place. Vital movements begin, though far too small to feel.

Risk of miscarriage drops significantly. NIPT (non-invasive prenatal testing) and the nuchal translucency scan are usually offered.

Energy often returns and nausea fades. Baby's facial expressions begin.

Some women begin to feel fluttering ('quickening'), especially in second pregnancies.

Baby practices breathing-like motions. Hearing is developing.

The detailed anatomy ultrasound is done around now. Sex can usually be determined if you'd like to know.

Baby can hear muffled sounds — your voice, music, the dog. Eyebrows and lashes are visible.

Considered the medical edge of viability. Glucose testing is offered around weeks 24–28.

The eyes start to open. Lung surfactant is being produced.

Increased prenatal visits begin. Kick counts may be recommended.

The brain develops rapidly. Baby may have sleep cycles.

Bones are fully formed but still soft. Practice contractions (Braxton Hicks) can be felt more often.

Lungs continue to mature. Most babies start moving into a head-down position.

Group B strep screening is typical. Pack a hospital bag.

Baby is considered early term. Birth from now on is generally low risk.

Vernix and lanugo shed. Position is locked in for most babies.

Only about 4% of babies arrive on the exact due date. Anywhere from 38 to 42 weeks is normal.