Uterus and bubs measuring smaller than dates

[Traveller]

braxton hicks from as early as 1st trimester are not uncommon, they're just sometimes more obvious in subsequent pregnancies because your body has been through it all before. As for measuring, it is only one of the tools used to assess fetal wellbeing. As a general guide you would be referred for more testing if there was a difference of 3 or more cm's between your dates and your measurements, but some women will carry small for their entire pregnancy and others will carry large and this does not necessarily reflect the size or health of your baby. It is more of a concern if there is a big change, for example you usually measure 2cm over and now measure 2cm less because that suggests a big drop iyswim. However if you are concerned about what has been mentioned then don't be afraid to contact your midwife and ask for clarification, and if you are even concerned that you might be in labour then always ask a health professional just to cover all bases.