Pregnancy week by week

6 weeks pregnant

At 6 weeks you are in month 2 and the first trimester. Your baby is about the size of a lentil: 0.5 cm.

As big as

lentil

Length

0.5 cm

Month

2

Trimester

first trimester

To go

238 days

Averages. Measured crown to rump up to week 20, crown to heel after that. Healthy babies vary a lot.

Your baby this week

The heart is beating; tiny buds are becoming arms and legs.

Your body

Nausea can appear, and not just in the morning.

Good to know

The heart starts beating before most women have had their first appointment.

To sort around these weeks

  • Take a pregnancy test and book a first appointment with a midwife or your GP.
  • Work out your due date with the calculator so you know where you are.

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Frequently asked questions

How many months is 6 weeks pregnant?

6 weeks pregnant falls in month 2 of your pregnancy.

Which trimester is 6 weeks?

At 6 weeks you are in the first trimester.

How big is a baby at 6 weeks?

On average 0.5 cm, about the size of a lentil. Healthy babies vary a lot.

How long to go at 6 weeks?

Until your due date (40 weeks): 34 weeks, 238 days.

All weeks

General information, not medical advice. If in doubt, call your midwife or GP. Sources: WHO fetal growth charts (Kiserud et al., PLoS Med 2017); Robinson and Fleming 1975; NHS, Your pregnancy and baby guide.