Conversation: The conversation between human and AI assistant.
[|Human|] hello doctor, i am 20 weeks pregnant and my scan report shows the followingA single, live, intra uterine fetus is seen exhibiting active movementsplacenta; posterior       maturity grade.  1amniotic fluid: adequateheart;150 bpmBpd: 42mmAC: 130 mmFL :28 mmestimated gestational age: 18 w 6 daysestimated fetal weight: 0256 gmsis there  any  problems in this report  and what about the growth ?  it is 1 week lowe than the actual
[|AI|]  Hi there,This is an absolutely normal findings of ultrasound scan at 20 weeks. The measurements give an estimate of weeks but, a variability from the actually calculated date can be present, as ultrasound only gives a rough estimate. So in effect the ultrasound findings can be plus or minus 1 week in first trimester; 2 weeks in second trimester; and more than two weeks in third. This variability is decreased with newer machines but can't be totally removed. So I would say that this report is absolutely reassuring, and you should not worry at all. A good fetal heart rate and a placenta which is only grade 1 maturity indicates that everything is as it should be at this stage. Do not worry. Hope this helps. Regards.