Overview
Halfway there! The mid-pregnancy scan often happens around now. Halfway there is a big emotional milestone, and week 20 often includes the anatomy scan that gives a detailed look at how the baby is growing.
Second Trimester · Weeks 14–27
Week 20 Pregnancy
Halfway there! The mid-pregnancy scan often happens around now.
About the size of a banana3 min read10 sections
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Baby Development
The baby is swallowing more, moving with more strength, and developing organs and limbs in ways the anatomy scan can often assess in detail. The nervous system and senses keep maturing, while sleep-wake patterns start becoming more distinct.
Baby Size
A playful size comparison for this week is banana. That banana-sized baby is long, active, and developed enough for the anatomy scan to capture a much richer picture.
Mother's Body Changes
Your bump is usually obvious now, and posture changes can make the lower back, ribs, or hips feel more involved in daily life. You may also feel more regular movement, which can be both thrilling and oddly reassuring.
Common Symptoms
Week 20 often brings backache, leg cramps, heartburn, stronger movements, skin itching, and occasional breathlessness on exertion. Some people also notice a darker linea nigra or new stretch marks around this point.
Nutrition Tips
Keep protein, calcium, iron, and fibre steady because the baby's growth is accelerating and your body is carrying more physical demand. A balanced home meal pattern usually does more for you now than chasing individual superfoods.
Exercise & Movement
Movement that supports posture is especially valuable around week 20, including walking, pelvic tilts, stretching, and prenatal yoga. If standing for long periods worsens discomfort, break it up rather than pushing through.
Emotional Wellbeing
The anatomy scan can bring excitement, vulnerability, and a lot of mental noise. Even when everything goes smoothly, many parents feel emotionally wrung out afterwards.
Partner Support
Partners can be wonderfully supportive this week by attending the scan if possible, helping process information calmly, and making space for whatever feelings show up after. Halfway is big for both of you.
Warning Signs
Urgent warning signs this week include heavy bleeding, severe abdominal pain, fever, fainting, leaking fluid, or a severe headache with vision changes. Reach out for bleeding, painful persistent cramps, leaking fluid, or strong one-sided pain, and do not ignore severe headache or visual changes just because the pregnancy has felt straightforward so far.
Frequently Asked Questions
The scan usually looks closely at the baby's organs, limbs, growth, placenta, and amniotic fluid. It is one of the most detailed routine scans of pregnancy.
ParentVibes Tip
You may find out the sex at your scan — only if you'd like to. After your anatomy scan, write down both the medical details and the emotional moments you want to remember.
Continue your journey
Explore the full second trimester guide.
ParentVibes offers general information, not medical advice. Always follow your doctor or midwife.