Week 1 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
a grain of rice or poppy seed
0.1 inches · less than 1 oz
Baby this week
- •Conception has just occurred - sperm and egg have merged to form a single cell
- •The zygote begins its journey through the fallopian tube toward the uterus
- •Cell division has started, though it's invisible to the naked eye
You this week
- •You likely have no pregnancy symptoms yet - it's still too early
- •You may experience typical menstrual cycle symptoms if you're tracking closely
- •Hormonal changes are beginning, but aren't noticeable
This week's tips
- •Start taking prenatal vitamins with folic acid if you haven't already - this supports crucial early development
- •Keep track of your cycle if you're trying to conceive; some people find ovulation tracking helpful
- •Focus on healthy habits: balanced nutrition, regular movement, adequate sleep, and stress management
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
Over the next week, your developing embryo will continue dividing and traveling to the uterus, where it will begin implanting around week 4. Most pregnancy tests won't detect anything until after implantation occurs.
Track your pregnancy on BringBaby
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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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