Week 5 of Pregnancy
First trimester
For informational purposes only. This page is not medical advice. Every pregnancy is different — always consult your doctor, midwife, or healthcare provider for guidance specific to your situation. In an emergency, call your provider or 911 immediately.
Baby is
about the size of a sesame seed
0.125 inches · less than 1 gram
Baby this week
- •Heart begins to beat and circulate blood
- •Neural tube (future brain and spinal cord) is closing
- •Arm and leg buds are starting to form
You this week
- •Missed period (the sign that brought you here)
- •Breast tenderness and swelling
- •Nausea or food aversions
- •Fatigue that feels unlike anything before
- •Frequent urination
- •Mood swings from hormone changes
This week's tips
- •Schedule your first prenatal appointment if you haven't already—your provider will confirm the pregnancy and establish your care plan
- •Start taking prenatal vitamins with folic acid (or keep taking them if you were already doing so)
- •Give yourself permission to rest—growing a baby is literally exhausting work
- •Keep a food journal if nausea is hitting hard; you'll start to notice what triggers it
- •Let your doctor know about any medications or supplements you're taking
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
Week 6 often brings an ultrasound where you might see that tiny heartbeat—one of the most emotional moments many parents experience. For now, just know that your body is doing incredible things, even if they're invisible.
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For informational purposes only. This page is not medical advice. Every pregnancy is different — always consult your doctor, midwife, or healthcare provider for guidance specific to your situation. In an emergency, call your provider or 911 immediately.
This content is for informational purposes only and is not medical advice. Every pregnancy and baby is different. Always consult your doctor, midwife, or pediatrician for guidance specific to your situation.
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