Surface tension I think. which makes it feel like you are hitting concrete when you fall onto water from extreme heights.
The indicators of nutritional risk in pregnancy in a client who is of normal weight are; smoker, Twin gestation, and also term delivery 2 years ago . Smokers usually have a nutrient-poor diet and are at risk of continuing the same diet during pregnancy. Multifetal pregnancies require nutrition above the normal requirements for pregnancy.
It is very important . It is a very complex process which prepares the body for potential pregnancy each month.