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First trimester

12 Weeks Pregnant

End of the first trimester

This week your baby is around the size of a plum.

How your baby is developing

  • Many parents reach the end of the first trimester around now.
  • Your baby keeps developing, and tiny movements may be starting (far too small to feel).

What may be happening in your body

  • Many reach the end of the first trimester around now, and for some the worst of the nausea and tiredness starts to lift.
  • You may feel a little more like yourself as early symptoms settle, though this can take longer for others.
  • Your waist is probably starting to thicken and your breasts getting bigger, so clothes can begin to feel snug.

How you may be feeling

  • A first scan around this time can make the pregnancy feel more real and, for some, bring a wave of relief.
  • Relief, excitement, and lingering nerves can all sit side by side after reaching this milestone.
  • Some feel ready to start sharing the news, while others prefer to wait a little longer, and both are common.

Worth remembering

Whether symptoms fade now or later, both follow a normal, wide-ranging pattern.

A closer look

The end of the first trimester

Week twelve is a milestone many people count toward, and early symptoms like nausea and fatigue begin to ease for a lot of parents around now. Timing still varies widely, so feeling better slowly, or not quite yet, both sit within the normal range. This shift tends to be gradual rather than a switch flicking off.

When it starts to feel real

Seeing your baby at a first scan can turn the pregnancy from an idea into something visible, and strong feelings in this moment are common. Some people feel reassured, while others feel more anxious once it all becomes real. If that worry lingers, sharing it with someone close can help.

Something you can do this week

It can help to note any questions for your midwife or doctor.

What comes next

Entering the second trimester, many parents notice returning energy.

Professional support

Services ParentSide defines for this stage. Each page explains what the service covers and which professionals are approved to provide it.

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Sources and updates

Last reviewed:
This content is based on estimated averages and general information; it does not replace medical advice. If you are concerned about yourself or your baby, speak with a qualified healthcare professional.

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