The following text explains the different types of contractions during a pregnancy.

Braxton Hicks Contractions:

The muscle of the uterus need to flex to strengthen themselves and (later on) to gradually soften the cervix in preparation for the actual birth.  This spontaneous and irregular contracting of the muscle begins early in the pregnancy, but is only normally noticed by women from about the 20th week.

A British doctor named John Braxton-Hicks first described this process some time in the late nineteenth century, this is why they carry his name.  These contractions should normally be painless, which differentiates them from false labor.

These contractions become more frequent and more pronounced towards the end of the pregnancy.  The shapes that are formed by the belly are incredible as you can see arms and legs bulging out as the muscles contract.  You will think that the baby must be very uncomfortable to be squashed in this way, but don't worry, he/she handles it just fine.

Contractions can sometimes be brought on by light exercise or dehydration, so it is important to keep drinking plenty of fluids so that the uterus does not become over-irritated.

Before 37 weeks of pregnancy, if contractions become regular or painful or are accompanied by any type of discharge you should contact your doctor immediately.

1. Braxton Hicks Contractions 

2. Pre-Labor, False Labor and True Labor