6 Weeks Pregnant
Welcome to week 6 of pregnancy. Your baby is now about the size of a lentil — roughly 0.6 cm from crown to rump and around under 1 grams. Below: what is developing, what you may be feeling, and the appointments that belong to this week.
Baby at 6 weeks
| Size comparison | About the size of a lentil |
|---|---|
| Crown-to-rump length | ~0.6 cm |
| Weight | ~under 1 g |
| Trimester | Trimester 1 of 3 · about 1.4 months |
What's developing
- The neural tube — the precursor of brain and spinal cord — closes this week.
- A tiny heart tube begins pulsing and can sometimes be seen on a transvaginal scan at the end of this week.
- Arm and leg buds emerge as small paddles on the torso.
You at 6 weeks
- Early nausea and food aversions often begin around now.
- Breast tenderness and fatigue are common from rising hormones.
- Frequent urination may start as blood volume begins to rise.
This week's checklist
- Schedule your first prenatal appointment if you have not.
- Start or continue a prenatal vitamin with 400–800 mcg folic acid.
- If you have questions about medication safety, ask now.
Frequently asked questions
How many months is 6 weeks?
About 1.4 months — use the weeks-to-months converter for the full breakdown.
Is my due date still accurate at this stage?
If your dating came from a first-trimester scan, IVF dates, or tracked ovulation, yes. If your due date rests on a remembered period alone, the multi-anchor due date calculator can show how much other anchors would move it.