Trimester 1
4 weeks pregnant: Implantation week and first signs
Here is what to expect this week for you and your baby.
Baby Size Sesame seed (til) 0.2 cm A poppy seed (~2 mm). Implantation completes.
Baby Development
- Embryo fully implants in uterine wall
- Neural tube (brain and spinal cord) begins forming
- Heart tube starts to develop
Common Symptoms
- Missed period
- Morning sickness may begin
- Breast swelling and tenderness
- Mood swings
Tips & Advice
- Confirm pregnancy with a blood test (beta-hCG)
- Avoid raw or undercooked meat and fish
- Start gentle walking for 20-30 minutes daily
Nutrition Guide
- Iron-rich foods: palak, rajma, dates (khajoor)
- Vitamin B6: banana, potato, chickpeas to ease nausea
- DHA: fish oil supplements (if vegetarian, algae-based)
Medical Checklist
When to see your doctor at week 4
Some symptoms need attention right away. Contact your doctor or go to the nearest hospital if you notice any of these:
- Heavy bleeding (soaking a pad within an hour)
- Severe or persistent abdominal or pelvic pain
- Fever above 38°C (100.4°F)
Frequently asked questions
When will my home test be positive?
Most tests reliably turn positive within a day or two of the missed period.
Light bleeding — period or implantation?
Implantation bleeding is light, brief, pinkish. A period is heavier and lasts longer.
What if my test is faint?
A faint line usually still means positive. Retest in 48 hours; hCG typically doubles every 48–72 hours.
For partners
Schedule the first prenatal appointment together — being present early matters.
Prepare for your OB visit
- How soon should we schedule the first scan?
- Should I stop any current medications?
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