Pregnancy Week-by-Week Tracker
Select your week to see your baby's size, development milestones, and what to expect at every stage — from 4 weeks through your due date.
Select your week
Week 20
Baby's size
Banana
≈ 16.4 cm crown to rump
Baby's development
Halfway! Baby can hear your voice and may respond to loud sounds. Taste buds are working. Baby is sleeping and waking in cycles.
What mama may experience
The anatomy scan confirms healthy development. You're at the halfway point — celebrate!
Jump to a week
Also need a due date?
Use our due date calculator to find your estimated due date, trimester dates, and full milestone timeline.
Pregnancy week questions
What happens in each week of pregnancy?
Each week of pregnancy brings significant development — in the first trimester, the embryo develops all essential organs; in the second trimester, the baby grows rapidly and begins moving; in the third trimester, the baby gains weight and all systems mature for life outside the womb. Our week-by-week tracker covers the key highlights for each week from week 4 through week 40.
When do you start showing in pregnancy?
Most first-time mothers start showing a noticeable bump between weeks 16–20. Women who have been pregnant before often show earlier (weeks 14–16) because the abdominal muscles are more relaxed. Body type, uterine position, and the number of babies all affect when the bump appears. Many women still look pregnant for weeks after giving birth.
When can you feel baby move?
First-time mothers typically feel baby's movements (quickening) between 18–22 weeks. Women who have been pregnant before often notice movement earlier, around 16–18 weeks. Baby movements feel like fluttering, bubbles, or gentle taps at first. By the third trimester, movements become strong enough that others can feel them by placing a hand on the belly.
What are the three trimesters of pregnancy?
The first trimester spans weeks 1–12 (from last menstrual period), during which all the baby's major organs form. The second trimester spans weeks 13–26, during which the baby grows rapidly and movement begins. The third trimester spans weeks 27–40 (or until birth), during which the baby gains weight and all systems mature for birth.
What size is the baby each week of pregnancy?
Baby size is commonly compared to fruits and vegetables to make it relatable. At 6 weeks, baby is the size of a lentil. At 12 weeks, a lime. At 20 weeks, a banana. At 28 weeks, an eggplant. At 36 weeks, a head of romaine lettuce. At 40 weeks, a jackfruit. These comparisons are approximate — actual fetal size varies by baby and measurement method.
Related Guides