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 oz
Baby this week
- •Heart is beginning to beat and circulate blood
- •Brain, spinal cord, and nervous system are forming
- •Three layers of cells are developing into all body systems
- •Amniotic sac and yolk sac are supporting the embryo
You this week
- •Missed period (often the first sign you notice)
- •Breast tenderness and swelling
- •Nausea or queasiness (morning sickness may start)
- •Fatigue and feeling unusually tired
- •Frequent urination
- •Food aversions or cravings
- •Mood swings and emotional sensitivity
- •Mild cramping (similar to period cramps)
This week's tips
- •Schedule your first prenatal appointment if you haven't already
- •Start taking prenatal vitamins with folic acid if you haven't begun
- •Stay hydrated and eat small, frequent meals to manage nausea
- •Get extra rest—your body is working hard even though nothing shows yet
- •Avoid alcohol, smoking, and raw/undercooked foods
- •Consider telling your healthcare provider about any medications you're taking
- •Be gentle with yourself about emotions and energy levels
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
By week 6, you may be able to hear your baby's heartbeat on an ultrasound, which can make this pregnancy feel very real. Your symptoms may intensify over the coming weeks as hormones continue to shift.
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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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