8 weeks pregnant
First trimester about 1 month
At 8 weeks pregnant, your baby is about the size of a raspberry.
Baby this week
About 16mm. Fingers and toes are forming, the tail is disappearing, and the embryo is now officially called a fetus. All major organs are present in early form.
Did you know? At 8 weeks, the embryo officially becomes a fetus — all major body systems and organs are present, though still very small and undeveloped.
What she may be feeling
- Nausea continuing
- Fatigue
- Frequent urination
- Breast tenderness
- Visible veins on breasts
- Constipation
- Heartburn beginning
- Emotional highs and lows
Tips for her this week
- The first prenatal appointment includes a full health history, blood work, and often an ultrasound.
- You may hear the heartbeat for the first time — it's fast (150–170 bpm) and may feel surreal.
- Be honest with your doctor about all medications, supplements, and lifestyle habits.
- Ask about safe exercise, travel, and foods during pregnancy.
For partners
- The first prenatal appointment is typically this week — go with her if at all possible. You'll hear the heartbeat.
- Come prepared with a written list of questions for the doctor.
- The first appointment can be emotionally overwhelming — be ready to be her anchor.
- Start tracking appointments in a shared calendar.
Partner to-do list
- Attend the first prenatal appointment
- Bring a written list of questions
- Set up a shared pregnancy calendar
- Start reading about the second trimester so you know what's coming
This week together
- Ask doctor about genetic screening options
- Discuss birth preferences in general terms — hospital vs birthing center?
- Create a shared notes document for pregnancy milestones and questions
When to call your doctor or midwife
Contact your care provider right away, or call emergency services, if she has:
- Heavy bleeding
- Severe cramping
- Fever
- Loss of pregnancy symptoms suddenly after they were strong (worth mentioning to doctor)
Trusted guidance: NHS: Pregnancy · NHS: Pregnancy complications · ACOG: Pregnancy · Pregnancy Info: Your pregnancy
Common questions
How big is the baby at 8 weeks?
At 8 weeks pregnant, your baby is about the size of a raspberry. About 16mm.
How many months is 8 weeks pregnant?
8 weeks pregnant is about 1 month, in the first trimester.
What can partners do at 8 weeks?
The first prenatal appointment is typically this week — go with her if at all possible. You'll hear the heartbeat. Come prepared with a written list of questions for the doctor.